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Calculer.

a. 3x5-(5-12)
b. 5-(3-5x6)
c. 4x(2-3x9)+7
d. 9x(-2-4x5)-3
e. 63:(2-3x7+5x2)-11
f. 48:(2-12:4-7)-4

User Gupta
by
5.2k points

1 Answer

6 votes

A.

3 × 5 - (5 - 12)

= (3 × 5) - (5 - 12)

= 15 - (5 - 12)

= 15 - (-7)

= 15 + 7

= 22

B.

5 - (3 - 5 × 6)

= 5 - (3 - (5 × 6))

= 5 - (3 - 30)

= 5 - (-27)

= 5 + 27

= 32

C.

4 × (2 - 3 × 9) + 7

= 4 × (2 - (3 × 9)) + 7

= 4 × (2 - 27) + 7

= 4 × (-25) + 7

= -100 + 7

= -93

D.

9 × (-2 - 4 × 5) - 3

= 9 × (-2 - (4 × 5)) - 3

= 9 × (-2 - 20) - 3

= 9 × (-22) - 3

= -198 - 3

= -201

E.

63 ÷ (2 - 3 × 7 + 5 × 2) - 11

= 63 ÷ (2 - (3 × 7) + (5 × 2)) - 11

= 63 ÷ (2 - 21 + 10) - 11

= 63 ÷ (-9) - 11

= (63 ÷ (-9)) - 11

= -7 - 11

= -18

F.

48 ÷ (2 - 12 ÷ 4 - 7) - 4

= 48 ÷ (2 - (12 ÷ 4) - 7) - 4

= 48 ÷ (2 - 3 - 7) - 4

= 48 ÷ (-8) - 4

= (48 ÷ (-8)) - 4

= -6 - 4

= -10

User Sumanta
by
5.4k points