Bonjour pouvez vous m'aider pour c'est 4 exercice s'il vous plaît merci d'avance ​

Bonjour

1) 2/3 (2 + 3/4)

= 2/3 x [(2 x 4) / (1 x 4) + 3/4]

= 2/3 x (8/4 + 3/4)

= 2/3 x 11/4

= 22/12

= (2 x 11) / (2 x 6)

= 11/6

2) 2/3 x 2 + 3/4

= 4/3 + 3/4

= (4 x 4) / (3 x 4) + (3 x 3) / (4 x 3)

= 16/12 + 9/12

= 25/12

3) 1/2 + 1/3 - 1/6

= (1 x 3) / (2 x 3) + (1 x 2) / (3 x 2) - 1/6

= 3/6 + 2/6 - 1/6

= 5/6 - 1/6

= 4/6

= (2 x 2) / (2 x 3)

= 2/3

4) 1/2 : 1/3 : 1/4 : 1/5

= 1/2 x 3 x 4 x 5

= 60/2

= 30.

Bjr,

2/3(2 + 3/4) = 2/3(8/4 + 3/4) = 2/3 * 11/4 = 22/12 = 11/6.

2/3 * 2 + 3/4 = 4/3 + 3/4 = 16/12 + 9/12 = ...

1/2 + 1/3 - 1/6 = 3/6 + 2/6 - 1/6 = 5/6 - 1/6 = 4/6 = 2/3

1/2 : 1/3 : 1/4 : 1/5 = 1/2 * 3 * 4 * 5 = 3/2 * 4 * 5 = 12/2 * 5 = 6 * 5 = 30