Question

calculează și efectuează proba 9×4 72:4 63:9:7 64:8 21:7 64:8:4 55:5 39:3 80:5:2​

Answer 1

• 9×4=36

1. 36÷4=9
2. 36÷9=36

• 72÷4=18

1. 72÷18=4
2. 4×18=72

• 63÷9÷7=1

1. 63÷7÷9=1
2. 63÷7=1×9
3. 63÷9=1×7

• 64÷8=8

1. 8×8=64

• 21÷7=3

1. 21÷3=7
2. 3×7=21

• 64÷8÷4=2

1. 64÷4÷8=2
2. 64÷8=2×4
3. 64÷4=2×8

• 55÷5=11

1. 55÷11=5
2. 5×11=55

• 39÷3=13

1. 39÷13=3
2. 13×3=39

• 80:5:2=8

1. 80÷2÷5=8
2. 80÷5=2×4
3. 80÷2=5×8

Answer 2

Explicație pas cu pas:

9×4=26

P:26:4=9

72:4=18

P:18×4=72

63:9:7=1. (63:9=7. 7:7=1)

P:1×9×7

21:7=3

P:3×7=21

64:8:4=2:. (64:8=8. 8:4=2)

P;2×8×4=64

55:5=11

P:11×5=55

39:3=13

P:13×3=39

80:5:2=8. (80:5=16. 16 :2=8 )

P:8×5×2=80

BAFTA LA SCOALA!