Bonjour pouvez-vous m'aider svp ex 5 fraction

3/4 + 1/8 = 3/4 X 2/2 +1/8 = 6/8 +1/8 = 7/8

1/9 -1/6 = 6/54 -9/54 = -3/54 -1/18

1 -3/4 = 4/4 -3/4 = 1/4

5/9 + 5/6 = 30/54 +45/54 = 75/54 = 25/18

5/3 + 5/6 = 30/18 + 15/18 = 45/18 = 15/6

4/5 + 5/4 = 16/20 +25/20 = 41/20

bonsoir

ex5

on met les fractions au même dénominateur et on simplifie

3/4+1/8=6/8+1/8=7/8

1/9-1/6=6/54-9/54=-3/54=(-1×3)/(18×3)=-1/18

1-3/4=4/4-3/4=1/4

5/9+5/6=30/54+45/54=75/54=(25×3)/(18×3)=25/18

5/3+5/6=10/6+5/6=15/6=(5×3)/(2×3)=5/2

4/5+5/4=16/20+25/20=41/20