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Arvavaldis.
  Avaldise väärtuse mõiste.
         Tähtavaldis.
Tähtavaldise arvuline väärtus.
Oled juba tuttav selliste avaldistega:

  24 · 67 - 150 : 3
       ARVAVALDISED

3308 · 90 + 14 709
Oled juba tuttav selliste avaldistega:

a · 35 + 2308 = 9343
       TÄHTAVALDISED

 650 - 120 : y = 644
Arvuta avaldiste
   väärtused
Tuleta meelde,
     kuidas arvutad tähtavaldist:
a · 35 + 2308 = 9343
        a · 35 = 9343 - 2308
        a · 35 = 7035
             a = 7035 : 35
             a = 201
K: 201 · 35 + 2308 = 9343
                9343=9343
Tuleta meelde,
      kuidas arvutad tähtavaldist:
   650 - 120 : y = 644
          120 : y = 650 - 644
          120 : y = 6
                 y =120 : 6
                 y = 20
K: 650 - 120 : 20= 644
            644 = 644
Arvutada saab mitut moodi!

   58 · 3 · 3 - 10 =

   (58 · 3) · 3 - 10 =

   58 · (3 · 3) - 10 =

   (58 · 3 · 3) - 10 =
Arvavaldisi saad ka ise koostada.
Püüa seda teha, lugedes järgmisi lauseid:
        Suurenda arvude
       23 508 ja 5989 vahet
             4 korda.


      (23 508 – 5989) x 4=
Arvavaldisi saad ka ise koostada.
Püüa seda teha, lugedes järgmisi lauseid:
          Suurenda arvude
         45 000 ja 5 jagatist
              3 korda


          45 000 : 5 x 3=
Liida arvule 3785 arvude 24 ja 105 korrutis

          3785 + 24 x 105 =
 Arvust 4444 lahutatakse arvude 25 ja 45 korrutis

            4444 - 25 x 45 =
Arvude 37 ja 208 korrutist suurendatakse 1209 võrra

          37 x 208 + 1209 =
  Leia koostatud arvavaldiste väärtused vihikus.
Kirjuta tähtavaldised, vajadusel kasuta
                 sulgusid.
Arvule y liideti arv 5

Arvust 600 lahutati arvude u ja 56 summa

Lahuta arvust 78 arvude a ja b korrutis

Jaga arvude s ja t korrutis arvude 34 ja 23 vahega

Arvule m liideti 90 ja jagati arvude 108 ja 42
  summaga

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Avaldised tunnimaterjal18.11.2011

  • 1. Arvavaldis. Avaldise väärtuse mõiste. Tähtavaldis. Tähtavaldise arvuline väärtus.
  • 2. Oled juba tuttav selliste avaldistega: 24 · 67 - 150 : 3 ARVAVALDISED 3308 · 90 + 14 709
  • 3. Oled juba tuttav selliste avaldistega: a · 35 + 2308 = 9343 TÄHTAVALDISED 650 - 120 : y = 644
  • 4. Arvuta avaldiste väärtused
  • 5. Tuleta meelde, kuidas arvutad tähtavaldist: a · 35 + 2308 = 9343 a · 35 = 9343 - 2308 a · 35 = 7035 a = 7035 : 35 a = 201 K: 201 · 35 + 2308 = 9343 9343=9343
  • 6. Tuleta meelde, kuidas arvutad tähtavaldist: 650 - 120 : y = 644 120 : y = 650 - 644 120 : y = 6 y =120 : 6 y = 20 K: 650 - 120 : 20= 644 644 = 644
  • 7. Arvutada saab mitut moodi! 58 · 3 · 3 - 10 = (58 · 3) · 3 - 10 = 58 · (3 · 3) - 10 = (58 · 3 · 3) - 10 =
  • 8. Arvavaldisi saad ka ise koostada. Püüa seda teha, lugedes järgmisi lauseid: Suurenda arvude 23 508 ja 5989 vahet 4 korda. (23 508 – 5989) x 4=
  • 9. Arvavaldisi saad ka ise koostada. Püüa seda teha, lugedes järgmisi lauseid: Suurenda arvude 45 000 ja 5 jagatist 3 korda 45 000 : 5 x 3=
  • 10. Liida arvule 3785 arvude 24 ja 105 korrutis 3785 + 24 x 105 = Arvust 4444 lahutatakse arvude 25 ja 45 korrutis 4444 - 25 x 45 = Arvude 37 ja 208 korrutist suurendatakse 1209 võrra 37 x 208 + 1209 = Leia koostatud arvavaldiste väärtused vihikus.
  • 11. Kirjuta tähtavaldised, vajadusel kasuta sulgusid. Arvule y liideti arv 5 Arvust 600 lahutati arvude u ja 56 summa Lahuta arvust 78 arvude a ja b korrutis Jaga arvude s ja t korrutis arvude 34 ja 23 vahega Arvule m liideti 90 ja jagati arvude 108 ja 42 summaga