Bonjour vous pouvez m'aider en Maths sur p.49 ex.54

Bonjour,

a=

2/3 * 1/5 = 2/15

b=

-5/7 *-1/4 = 5/28

c=

5/6 * -11/7 = - 55/42

d=

8* 8 = 64

e=

-3/2 * -7/5 = 21/10

f=

1/10 * -9/7 = - 9/70

g=

-8/15 * -5/4 = 40/60 = 4/6 = 2/3

h=

9/10 * -1/3 = -9/30 = -3/10

i=

-4/45 * 15/16 = -60/720 = -1/12

j=

-5/6 *-18/15 = 90/90 =1

k=

12*-4/3 = -48/3 = -16

l=

1* -4/7 = -4/7