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Sagot :

Bonsoir

6)

a. - 0,7

b. 7,2/3

c. 2/0,5 = 4

d. - 30/7,5 = - 4

e. 1 + 2 = 3 donc l'inverse est 1/3

f. 1 + 1/2 = 2/2 + 1/2 = 3/2 donc l'inverse est 2/3

7)

a. 3/7 : 4/5 = 3/7 x 5/4 = 15/28

b. 6/11 : 5/4 = 6/11 x 4/5 = 24/55

c. 11/9 : 1/2 = 11/9 x 2 = 22/9

d. 15/4 : 2 = 15/4 x 1/2 = 15/8

e. 4 : 7/9 = 4 x 9/7 = 36/7

f. 3/8 : 5/7 = 3/8 x 7/5 = 21/40.

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