Réponse:
exercice 10:
3×(5×5)+7×2=75+14=89
5×5×5-10×2=125-20=105
A=89 et B=105
exercice 11
5×5×4-3=100-3=97
9-2×2×2+3×2=9-8+6=1+6=7
(13-5)×(13-5)+4×4=8×8+16=64+16=80
