Răspuns :
8×5+12×5=40+60=100
12×5-8×5=60-40=20
7×3+3×4+9×3=3×(7+4+9)=3×20=60
4×16+5×4-4×18=4×(16+5-18)=4×3=12
24×23+15×23-23×3=23×(24+15-3)=23×36=828
11×5+8×11+11×11=11×(5+8+11)=11×24=264
Răspuns:
8×5+12×5=40+60
=100
12×5-8×5=60-40
=20
7×3+3×4+9×3=21+12+27
=60
4×16+5×4-4×18=4×(16+5-18)=4×3=12
24×23+15×23-23×3=552+345-69
=897-69
=828
11×5+8×11+11×11=55+88+121
=143+121
=264