aidez moi pour mon ex de maths et vous pouvez mettre les calculs que vous avez faits svp

a) 4/3 + 10/6
= 4 x 2 / 3 x 2 + 10/6
= 8/6 + 10/6
= 18/6
= 6 x 3 / 6 x 1
= 6

b) 9/15 - 1/5
= 9/15 - 1 x 3 / 5 x 3
= 9/15 - 3/15
= 6/15
= 3 x 2 / 3 x 5
= 2/5

c) 10/25 + 7/5
= 10/25 + 7 x 5 / 5 x 5
= 10/25 + 35/25
= 45/25
= 5 x 9 / 5 x 5
= 9/5

d) 63/81 - 2/9
= 63/81 - 2 x 9 / 9 x 9
= 63/81 - 18/81
= 45/81
= 9 x 5 / 9 x 9
= 5/9

e) 30/20 - 6/4
= 30/20 - 6 x 5 / 4 x 5
= 30/20 - 30/20
= 0

f) 20/25 + 6/15
= 5 x 4 / 5 x 5 + 3 x 2 / 3 x 5
= 4/5 + 2/5
= 6/5