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Lembar Kerja Siswa (LKS)

Nama Kelompok : 1. _________________________________
2. _________________________________
3. _________________________________
4. _________________________________
5. _________________________________
Kelas

: ___________________________________

Masalah 1.
Tebakan Timbangan Kelereng
1.

Koko dan Inem bermain tebak-tebakkan dengan menggunakan beberapa bungkus plastik hitam,
beberapa buah kelereng, dan sebuah timbangan.

Koko memasukkan beberapa kelereng dalam jumlah sama ke
dalam dua bungkus plastik, kemudian meletakkannya di atas
sisi kanan timbangan yang sudah diletakkan pula 3 buah
kelereng secara terpisah. Di sisi kiri, Koko meletakkan sebuah
bungkus plastik berisi kelereng yang jumlahnya sama dengan masing-masing plastik di sisi kanan.
Agar seimbang, ternyata Koko perlu menambahkan 7 kelereng lagi di sisi kiri.
Dari cerita di atas, diskusikan pertanyaan-pertanyaan berikut dan isikan jawabanmu di dalam kotak!
a. Berapa banyak kelereng yang ada di dalam kantong tersebut?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________
b.

Jika di sebelah kiri ditambah 1 kantong lagi, maka berapa kelereng yang harus ditambahkan di
sebelah kanan?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________

c.

Jika Koko mengambil 7 buah kelereng yang di sebelah kiri, berapa kelereng dan berapa kantong
yang harus diambil di sebelah kiri agar timbangan tersebut seimbang.

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
________________________________________________________________________

d.

Bagaimana model matematika dari cerita di atas?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________
Lembar Kerja Siswa (LKS)

Nama Kelompok : 1. _________________________________
2. _________________________________
3. _________________________________
4. _________________________________
5. _________________________________
Kelas

Masalah 2
1.

: ___________________________________

Suatu ketika Ricko dan Ayahnya bermain bola di taman depan
rumah mereka, mereka terlihat sangat bahagia. Saat Ricko dan
Ayahnya bermain bola, Ricko mempunyai 2 kantong bola,
masing-masing kantong isinya sama. Ayahnya memberi lagi 10
bola, ternyata banyak bola Ricko sekarang lebih dari 30 bola.
Namun, disaat Ricko dan Ayahnya pulang, kantong bola Ricko
tertinggal 1 kantong di taman tersebut.

Dari cerita di atas, diskusikan pertanyaan-pertanyaan berikut dan isikan jawabanmu di dalam
kotak!

a.

Berapakah banyak bola yang ada di dalam tiap-tiap kantong Ricko?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________
b.

Berapa jumlah bola Ricko sebelum Ricko diberi bola oleh Ayahnya?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________

c.

Jika Adik Ricko meminta bola Ricko sebanyak kurang dari 5 bola, berapa jumlah bola Ricko
sekarang?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________

d.

Karena bola Ricko tertinggal di taman, maka jumlah bola Ricko sekarang adalah. . . .

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________
Lembar Kerja Siswa (LKS)

Nama Kelompok : 1. _________________________________
2. _________________________________
3. _________________________________
4. _________________________________
5. _________________________________
Kelas

: ___________________________________

Masalah 3
1.

Dua ekor katak, Komo dan Dodo, sedang dikejar oleh seekor ulat yang hendak memangsa mereka.
Pada saat mulai dikejar, Komo berada 3 meter di depan ular, sedangkan Dodo berada 1 meter di
belakang Komo. Mengetahui mereka sedang dalam bahaya, kedua katak itu melompat menjauh dari
ular. Komo melompat sebanyak 12 kali dan Dodo melompat 17 kali sebelum akhirnya mereka
bertemu di titik yang sama dan akhirnya ular itu pergi.
a. Jika masing-masing jarak setiap lompatan kedua katak tersebut sama, berapakah jarak setiap
lompatan tersebut?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________
b.

Jika ular itu berhasil menangkap mereka, berapa jarak yang ditempuh ular tersebut selama
pengejaran?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________

c.

Jika ular itu tidak berhasil menangkap mereka, berapa jarak yang ditempuh ular tersebut selama
pengejaran?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________

d.

Jika lompatan yang dilakukan oleh Komo sama dengan Dodo, apakah mereka akan bertemu
disatu titik?

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
_______________________________________________________________________

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Lks persamaan dan pertidaksamaan linear satu variabel

  • 1. Lembar Kerja Siswa (LKS) Nama Kelompok : 1. _________________________________ 2. _________________________________ 3. _________________________________ 4. _________________________________ 5. _________________________________ Kelas : ___________________________________ Masalah 1. Tebakan Timbangan Kelereng 1. Koko dan Inem bermain tebak-tebakkan dengan menggunakan beberapa bungkus plastik hitam, beberapa buah kelereng, dan sebuah timbangan. Koko memasukkan beberapa kelereng dalam jumlah sama ke dalam dua bungkus plastik, kemudian meletakkannya di atas sisi kanan timbangan yang sudah diletakkan pula 3 buah kelereng secara terpisah. Di sisi kiri, Koko meletakkan sebuah bungkus plastik berisi kelereng yang jumlahnya sama dengan masing-masing plastik di sisi kanan. Agar seimbang, ternyata Koko perlu menambahkan 7 kelereng lagi di sisi kiri. Dari cerita di atas, diskusikan pertanyaan-pertanyaan berikut dan isikan jawabanmu di dalam kotak! a. Berapa banyak kelereng yang ada di dalam kantong tersebut? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________
  • 2. b. Jika di sebelah kiri ditambah 1 kantong lagi, maka berapa kelereng yang harus ditambahkan di sebelah kanan? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________ c. Jika Koko mengambil 7 buah kelereng yang di sebelah kiri, berapa kelereng dan berapa kantong yang harus diambil di sebelah kiri agar timbangan tersebut seimbang. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ________________________________________________________________________ d. Bagaimana model matematika dari cerita di atas? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________
  • 3. Lembar Kerja Siswa (LKS) Nama Kelompok : 1. _________________________________ 2. _________________________________ 3. _________________________________ 4. _________________________________ 5. _________________________________ Kelas Masalah 2 1. : ___________________________________ Suatu ketika Ricko dan Ayahnya bermain bola di taman depan rumah mereka, mereka terlihat sangat bahagia. Saat Ricko dan Ayahnya bermain bola, Ricko mempunyai 2 kantong bola, masing-masing kantong isinya sama. Ayahnya memberi lagi 10 bola, ternyata banyak bola Ricko sekarang lebih dari 30 bola. Namun, disaat Ricko dan Ayahnya pulang, kantong bola Ricko tertinggal 1 kantong di taman tersebut. Dari cerita di atas, diskusikan pertanyaan-pertanyaan berikut dan isikan jawabanmu di dalam kotak! a. Berapakah banyak bola yang ada di dalam tiap-tiap kantong Ricko? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________
  • 4. b. Berapa jumlah bola Ricko sebelum Ricko diberi bola oleh Ayahnya? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________ c. Jika Adik Ricko meminta bola Ricko sebanyak kurang dari 5 bola, berapa jumlah bola Ricko sekarang? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________ d. Karena bola Ricko tertinggal di taman, maka jumlah bola Ricko sekarang adalah. . . . ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________
  • 5. Lembar Kerja Siswa (LKS) Nama Kelompok : 1. _________________________________ 2. _________________________________ 3. _________________________________ 4. _________________________________ 5. _________________________________ Kelas : ___________________________________ Masalah 3 1. Dua ekor katak, Komo dan Dodo, sedang dikejar oleh seekor ulat yang hendak memangsa mereka. Pada saat mulai dikejar, Komo berada 3 meter di depan ular, sedangkan Dodo berada 1 meter di belakang Komo. Mengetahui mereka sedang dalam bahaya, kedua katak itu melompat menjauh dari ular. Komo melompat sebanyak 12 kali dan Dodo melompat 17 kali sebelum akhirnya mereka bertemu di titik yang sama dan akhirnya ular itu pergi. a. Jika masing-masing jarak setiap lompatan kedua katak tersebut sama, berapakah jarak setiap lompatan tersebut? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________
  • 6. b. Jika ular itu berhasil menangkap mereka, berapa jarak yang ditempuh ular tersebut selama pengejaran? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________ c. Jika ular itu tidak berhasil menangkap mereka, berapa jarak yang ditempuh ular tersebut selama pengejaran? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________ d. Jika lompatan yang dilakukan oleh Komo sama dengan Dodo, apakah mereka akan bertemu disatu titik? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________