Question

Afla câturile ,folosind scăderea repetată ,apoi verifica, folosind înmulțirea. a)21:3,36:4, b)42:6 49:6 c) 63:7 ,56:6 d) 54:6, 81:9
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Answer 1

Explicație pas cu pas:

a) 21÷3=7 36÷4=9

21-3=18 36-4=32

18-3=15 32-4=28

15-3=12 28-4=24

12-3=9 24-4=20

9-3=6 20-4=16

6-3=3 16-4=12

3-3=0 12-4=8

8-4=4

4-4=0

b) 42:6=7

42-6-6-6-6-6-6-6=0

49÷6=8 rest 1

49-6-6-6-6-6-6-6-6=1

c) 63:7=9

63-7-7-7-7-7-7-7-7-7=0

56÷6=9rest2

56-6-6-6-6-6-6-6-6-6=2

d) 54÷6=9

54-6-6-6-6-6-6-6-6-6=0

81:9=9

81-9-9-9-9-9-9-9-9-9=0