Sagot :
Bonjour
A=39-3x(21-15)
39-3x6
39-18
21
B=(32+4)÷4+7
36÷4+7
9+7
16
C=21x(27-24)÷7
21x3÷7
9
D=24+(7+5)x3
24+12x3
24+36
60
Bonjour,
A = 39 - 3 × (21 - 15)
A = 39 - 3 × 6
A = 39 - 18
A = 21
B = (32 + 4) ÷ 4 + 7
B = 36 ÷ 4 + 7
B = 9 + 7
B = 16
C = 21 × (27 - 24) ÷ 7
C = 21 × 3 ÷ 7
C = 3 × 3
C = 9
D = 24 + (7 + 5) × 3
D = 24 + 12 × 3
D = 24 + 36
D = 60