Bonjour pouvez vous m'aider a faire les 2 exercices 1et 20et merci :

Bonsoir,

19)

A = 20 * 12 / 6 / 2 = 240 / 6 / 2 = 40 / 2 = 20

B = 10 * 8 / 4 * 5 = 80 / 4 * 5 = 20 * 5 = 100

C = 24 / 4 * 2 / 3 = 6 * 2 / 3 = 12 / 3 = 4

D = 30 / 6 * 5 * 2 / 10 = 5 * 5 * 2 / 10 = 25 * 2 / 10 = 50 / 10 = 5

20)

A = 22 - 9 - 3 = 22 - 12 = 10

B = 7 * 8 / 2 = 56 / 2 = 28

C = 215 - 14 + 1 + 3 - 7 = 215 - 17 = 198

D = 72 / 4 * 2 = 18 * 2 = 36

E = 1600 / 16 / 2 = 100 / 2 = 50

F = 37.3 - 18.3 + 10 = 37.3 - 8.3 = 29.3