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Sagot :

4/5*5=4
20*2/20=2
5,4/6*6=5,4
0,56/8*8=0,56

Bonjour

Compléter mentalement :

... x 5 = 4

... = 4/5

4/5 x 5 = 4

20 x ... = 2

... = 2/20

... = 2/(2 x 10)

... = 1/10

20 x 1/10 = 2

... x 6 = 5,4

... = 5,4/6

... = 54/60

... = (6 x 9)/(6 x 10)

... = 9/10

9/10 x 6 = 5,4

... x 8 = 0,56

... = 0,56/8

... = 56/800

... = (7 x 8)/(100 x 8)

... = 7/100

7/100 x 8 = 0,56

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