Question

Cum se calculeaza exercitiile in doua moduri:8×(40+45)=;9×(120-15)=

Answer 1

Modul 1: 8×(40+45)=8×85=680 Modul 2. (8×40)+(8×45)=320+360=680 Md 1:9×(120-15)=9×105=945 Md 2:(9×120)-(9×15)=1 080-135=945

Answer 2

a)
Metoda1: 8x85=680
Metoda2: 8x40  +  8x45 = 320 + 360 = 680
Metoda3: 8x(40+40+5) = 320 + 320 +40 = 680

b)
Metoda1: 9x105=9(100+5)= 900+45=945
Metoda2: 9x105=945
Metoda3: 9x120  - 9x15 = 1080 - 135 =945
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Succes in continuare!