CORRECTION DU CALCUL MENTAL SEMAINE 6
VERT
Mardi 5/05
A = (−2𝑥 + 3)(4𝑥 − 6) − (2𝑥 + 1) = −8𝑥
2+ 12𝑥 + 12𝑥 − 18 − 2𝑥 − 1 = −8𝑥
2+ 22𝑥 − 19 B = 1
4 + 3 4 × 7
6 = 1
4 + 3 × 7 4 × 3 × 2 = 2
8 + 7 8 = 9
8
Mercredi 6/05 :A = (4𝑥 + 1) + (4𝑥 − 6) − (2𝑥 + 1) = 4𝑥 + 1 + 4𝑥 − 6 − 2𝑥 − 1 = 6𝑥 − 6 B = 3
2× 3
−43
6= 3
2−4−6= 3
−8Jeudi 7/05 :