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BAB 1 MATEMATIKA 
Oleh ALVIN NUR SA’BAN
Sesuatu yang dapat dinyatakan dengan bilangan bulat 
Thermometer 
Sepanjang bulan Januari 2014, suhu di Eropa berubah naik 
turun secara drastis. Saat 
siang hari bisa mencapai 10° C (baca 10 derajat Celsius) di 
atas titik beku (0° C), 
sedangkan pada malam hari turun hingga 15° C di bawah 
titik beku. 
Ungkapan 10 di atas titik beku, dan 15 di bawa titik 
beku, secara berurutan bisa ditulis sebagai bilangan bulat 
“+10” (baca positif sepuluh) dan“−15” (baca negatif 
lima belas). Untuk bilangan “+10” cukup ditulis “10”. 
Bilangan bulat dibedakan menjadi tiga bagian, 
yaitu bilangan bulat negatif, nol, dan bilangan bulat 
positif. Pada garis bilangan, bilangan bulat positif 
terletak di kanan bilangan nol. Sedangkan bilangan 
bulat negatif terletak di kiri nol. Untuk lebih jelasnya
EVALUASI TOPIK 1
Seorang penyelam amatir mula-mula berlatih menyelam di 
kedalaman 2 meter di bawah permukaan laut. Setelah merasa 
lancar menyelam di kedalaman 2 meter,kemudian ia turun lagi 
hingga kedalaman 5 meter di bawah permukaan laut. 
Berapakah selisih kedalaman pada dua kondisi tersebut?
. Sebuah kapal selam, mula-mula menyelam 120 m di bawah 
permukaan laut, 
kemudian kapal bergerak ke bawah sejauh 60 m. Coba nyatakan 
posisi kapal 
selam dari permukaan laut dengan penjumlahan bilangan bulat!
Dua ekor ikan mas berada di dalam akuarium. Ikan yang besar 
15 cm berada dibawah permukaan air dan ikan yang kecil 9 cm 
berad di bawah permukaan air. 
Berapa perbedaan jarak kedua ekor ikan dari permukaan air?
. Edward ingin membuat katrol timba air. Ketinggian katrol di 
atas permukaan tanah 2 m 
dan permukaan air 3 m di bawah permukaan tanah. Berapa panjang 
tali dari permukaan
.5000+1.500:300 x 2:5=

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Materi matematika...........bab 1 topik 1

  • 1. BAB 1 MATEMATIKA Oleh ALVIN NUR SA’BAN
  • 2.
  • 3.
  • 4.
  • 5. Sesuatu yang dapat dinyatakan dengan bilangan bulat Thermometer Sepanjang bulan Januari 2014, suhu di Eropa berubah naik turun secara drastis. Saat siang hari bisa mencapai 10° C (baca 10 derajat Celsius) di atas titik beku (0° C), sedangkan pada malam hari turun hingga 15° C di bawah titik beku. Ungkapan 10 di atas titik beku, dan 15 di bawa titik beku, secara berurutan bisa ditulis sebagai bilangan bulat “+10” (baca positif sepuluh) dan“−15” (baca negatif lima belas). Untuk bilangan “+10” cukup ditulis “10”. Bilangan bulat dibedakan menjadi tiga bagian, yaitu bilangan bulat negatif, nol, dan bilangan bulat positif. Pada garis bilangan, bilangan bulat positif terletak di kanan bilangan nol. Sedangkan bilangan bulat negatif terletak di kiri nol. Untuk lebih jelasnya
  • 6.
  • 7.
  • 9. Seorang penyelam amatir mula-mula berlatih menyelam di kedalaman 2 meter di bawah permukaan laut. Setelah merasa lancar menyelam di kedalaman 2 meter,kemudian ia turun lagi hingga kedalaman 5 meter di bawah permukaan laut. Berapakah selisih kedalaman pada dua kondisi tersebut?
  • 10. . Sebuah kapal selam, mula-mula menyelam 120 m di bawah permukaan laut, kemudian kapal bergerak ke bawah sejauh 60 m. Coba nyatakan posisi kapal selam dari permukaan laut dengan penjumlahan bilangan bulat!
  • 11. Dua ekor ikan mas berada di dalam akuarium. Ikan yang besar 15 cm berada dibawah permukaan air dan ikan yang kecil 9 cm berad di bawah permukaan air. Berapa perbedaan jarak kedua ekor ikan dari permukaan air?
  • 12. . Edward ingin membuat katrol timba air. Ketinggian katrol di atas permukaan tanah 2 m dan permukaan air 3 m di bawah permukaan tanah. Berapa panjang tali dari permukaan