Question

1 ) Află numărul necunoscut a : 7 = 4 7× b = 35 63:c = 7 d × 7 = 56 2 ) 6 × a = 54 42 : b= 7 c : 8 = 10 d × 7 =49 3) 9 × d =18 s :5=4. x ×3=15 y× 7=21 ​

Answer 1

Răspuns:

1

a÷7=4

a=4×7

a=28

7×b=35

b=35÷7

b=5

63÷c=7

c=63÷7

c=9

d×7=56

d=56÷7

d=8

2

6×a=54

a=54÷6

s=9

42÷b=7

b=42÷7

b=6

c÷8=10

c=8×10

c=80

d×7=49

d=49÷7

d=7

3

9×d=18

d=18÷2

d=9

s÷5=4

s=5×4

s=20

x×3=15

x=15÷3

x=5

y×7=21

y=21÷7

y=3