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Calculeaza in 2 moduri.
7x(3+5)=
7x(3+5)=
8x(15+27)=
8x(15+27)=
4x(309+584)=
4x(309+584)=


Răspuns :

7x(3+5)=7x8 primul mod
7 × (3+5) = 7 ×8= 56
7×3+7×5= 21+35= 56
8 × (15+27)=8×42= 336
8×15+8×27=120+216= 336
4×(309+584)= 4×893=3572
4× ( 309+584) = 4×309+4×584=1236+2336=3572.
Coroana?