Fractions. aidez moi. svp. il ny en a pas bezucoup.

bonjour

A = 11/3 - 8/3 : ( - 16/5)
A = 11/3 - 8/3 x - 5/16
A = 11/3  + 40/48
A = 176/48 + 40/48 = 216/48 = 9/2

B = (1 -3/2 +9/7) : (5/4 -1/3)
B = ( 14/14 - 21/14 +18/14) : ( 15/12 -4/12)
B = 11/14 : 11/12
B = 11/14 x 12/11
B = 12/14 = 6/7

C = 2 x 10³ x 5 x (10⁻⁵)² sur 2 +18
C = 10 x 10³x 10⁻¹° sur 20
C = 0,5 x 10⁻⁷
C = 5 x 10⁻⁶

D = 7 x 10⁻³ sur 63 x 10⁻⁵
D = 0.1111 x 10 ²
D = 1.1 x 10