Explicație pas cu pas:
4×(18+14)=4×32=128
4×(18+14)=4×18+4×14
=72+56
=128
(5+2+4)×6=11×6=66
(5+2+4)×6=5×6+2×6+4×6
=30+12+24
=66
7×(21-5)=7×16=112
7×(21-5)=7×21-7×5
=147-35
=112
Răspuns:
4×(18+14)=4×32
(5+2+4)×6=11×6
=42+24
7×(21-5)=7×16
