Réponse :
Explications étape par étape
Bonjour
Q1
33- [8*2 +9] = 33 - 25 =8
Q2
2* 6 + 3 = 12+3 = 15
Q3
(21/7 )7 +4 = 3*7 +4= 21+4 = 25
Q4
48 -12* 2 = 48 -24 = 24
Q(
141 -75 -63 = 2
1)
A = 33 - [8×(10-8)+9]
A = 33 - (8×2+9)
A = 33 - (16+9)
A = 33 - 25
A = 8
2)
A = 2×6+(14-11)
A = 2×6 + 3
A = 12 + 3
A = 15
3)
A = 21÷7×(9-2)+4
A = 21÷7×7+4
A = 21 + 4
A = 25
4)
A = 48 - ( 3 + 17 -8)×(25-23)
A = 48 - (20-8)×2
A = 48 - 12×2
A = 48 - 24
A = 24
5)
A = 141 - ( 5 + 70) - 7×9
A = 141 - 75 - 7×9
A = 141 - 75 - 63
A = 66 - 63
A = 3
