Bonjour à tous, est il possible de m’aider pour cette exercices s’il vous plaît ? car je n’ai pas compris :/. Merci à tous.

Bonsoir,

A = 3/2 - 15/9 x 12/25

A = 3/2 - 15/25 x 12/9

A = 3/2 - (3 x 5)/(5 x 5) x (3 x 4)/(3 x 3)

A = 3/2 - 3/5 x 4/3

A = 3/2 - 3/3 x 4/5

A = 3/2 - 4/5

A = 15/10 - 8/10

A = 7/10

B = 8/3 - 5/3 : 20/21

B = 8/3 - 5/3 x 21/20

B = 8/3 - 5/20 x 21/3

B = 8/3 - 1/4 x 7

B = 8/3 - 7/4

B = 32/12 - 21/12

B = 11/12

C = (15 x (10^3)^2)/(6 x 10^5 x 10^3)

C = 15/6 x 10^(6-5-3)

C = 15/6 x 10^(-2)

C = 2,5 x 10^(-2)

D = (150 x 10^4 x 8 x 10^5)/(6 x 10^7)

D = (150 x 8 / 6) x 10^(4+5-7)

D = 200 x 10^2

D = 2 x 10^4