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Sagot :

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17)

a. 2

b. 2/3

c. 1/6

d. - 1/15

e. 1

f. - 5/7

g. - 11/6

h. - 13/4

18)

a. 2/5 : 9/11 = 2/5 x 11/9 = 22/45

b. 3/7 : 8/13 = 3/7 x 13/8 = 39/56

c. 5/8 : 9/17 = 5/8x 17/9 = 85/72

d. 3/2 : 7/5 = 3/2 x 5/7  = 15/14

e. 3 : 2/7 = 3 x 7/2 = 21/2

f. 15/4 : 7 = 15/4 x 1/7 = 15/28.

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