Bonjour est ce que vous pouvez m’aider s’il vous plaît ?

Bonjour,

a)

2/5 + 5/5 = 7/5

b)

6/20 = 3/10

c)

2/15 +2/5 = 2/15 + 6/15 = 8/15

d)

3/5 * 5/2 = 15/10 = 3/2

e)

3/2 -10/6 =  9/6 -10/6 = -1/6

2/7 +1/3 = 6/21 + 7/21 = 13/21

-1/6 * 21/13 = -21/78 = -7/26

f)

1/1/3 = 3/3+1/3 = 4/3

3- (5/ 4/3) =

3-  5 / (4/3)

3- 5*3/4 =

3- 15/4 =

12/4 -15/4 = -3/4