bonjour
A = 12/7 + 6/7 x 1/3
= 12/7 + 6/21
= 36 /21 + 6 /21
= 42/21 = 2
B = 14 /3 : ( 3/4- 1/6 )
= 14/3 : ( 9/12 - 2 /12)
= 14/3 : 7/12
= 14 x 12 : 3 x 7
= 168 : 21 = 8
C = 2 x ( 22 - 4 ²)² - 9 x 2 ³
= 2 ( 22 - 16 )² - 9 x 8
= 2 x 6 ² - 72
= 72 - 72 = 0
D = 4.9 x 10 ²⁶ : 14 x 10 ⁵
= 0.35 x 10 ²¹
= 3.5 x 10 ²⁰
