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rezolva fiecare exercitiu in doua moduri.4×(3+5),7×(2+6)

Răspuns :

1)12+20=32 sau 4x8=32
2)14+42=56 sau 7x8=56
4x(3+5) = 4x8=32  sau   4x(3+5)= (4x3)+(4x5)= 12+20=32
7x(2+6)= 7x8=56             7x(2+6)=(7x2)+(7x6)= 14+42=56