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Sagot :

Bonjour

Calculer

a. 3x5 - (5 - 12)  = 15 - (- 7) = 15 + 7 = 22

b. 5 - (3-5 X 6)  = 5 - (3 - 30) = 5 - (- 27) = 5 + 27 = 32

c. 4 X (2-3 x 9) + 7  = 4 x (2 - 27) + 7 = 4 x (- 25) + 7 = - 100 + 7 = - 93.

d. 9 (-2 - 4 × 5) - 3  = 9 (- 2 - 20) - 3 = 9 x - 22 - 3 = - 198 - 3 = - 201

e. -63: (2-3 x 7 + 5 x 2) - 11  = 63 : (2 - 21 + 10) - 11 = 63 : (- 9) - 11 = - 7 - 11 = - 18

f. 43:(2-12:4-7)-4 = 43 : (2 - 3 - 7) - 4 = 43 : - 8 - 4 = - 5,375 - 4 = - 9,375.

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