Question

Afla numarul necunoscut, in fiecare caz, folosind proba inmultirii si a impartirii, dupa modelele de mai jos

Answer 1

8×m=72
m=72:8
m=9

Proba: 8×9=72

n×6=42
n=42:6
n=7

Proba: 7×6=42

36:p=9
p=36:9
p=4

Proba: 36:4=9

40:r=5
r=40:5
r=8

Proba: 40:8=5

s:5=8
s=8×5
s=40

Proba: 40:5=8