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Sagot :

a) 22 b) 6,80 c) 26 d) 15

__ ____ ___ __

18 3 20 18

a) 5x3 7 22

___ + __ = __

6x3 18 18

b) 7x4 1 27

__ - __ = ____

3x4 12 12

c) 11 3x5 26

__ + ___ = ____

20 4x5 20

d) 23 8 15

__ - ___ = __

18 18 18

Explications étape par étape:

A)

5 7 5×3 7 15 7 15 + 7 22

_+_= _ +_ = _ + _ =______= __

6 18 6×3 18 18 18 18 18

B)

7 1 7×4 1 28 1 28-1 27

__ - __= ___ - ___ = ___ - __= _____=__

3 12 3×4 12 12 12 12 12

C)

11 3 11 3×5 11 15 11-15 4

_ +__ = __ + ___ = __ + __= _____= ___

20 4 20 4×5 20 20 20 20

D)

23 8 23-8 15

__ - __ = _____= ___

18 18 18 18

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