Bonjour

1)

A = 7/6 + 2/3

A = 7/6 + (2 x 2) / (3 x 2)

A = 7/6 + 4/6

A = 11/6

B = 3/5 + 11/10

B = (3 x 2) / (5 x 2) + 11/10

B = 6/10 + 11/10

B = 17/10

C = 8/9 - 1/3

C = 8/9 - (1 x 3) / (3 x 3)

C = 8/9 - 3/9

C = 5/9

D = 5 + 3/2

D = (5 x 2) / (1 x 2) + 3/2

D = 10/2 + 3/2

D = 13/2.

2)

1) 1/20 + 3/10 = 1/20 + (3 x 2) / (10 x 2) = 1/20 + 6/20 = 7/20

7/20 des bonbons ont été mangés

2) 1 - 7/20 = (1 x 20) / (1 x 20) - 7/20 = 20/20 - 7/20 = 13/20

Il reste 13/20 de bonbons

3) 200 x 13/20 = 130.

Il reste 130 g de bonbons dans le sachet.