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Calculeaza: 4 x a + 7 ori b (răspuns de clasa a 3 a) ​

Răspuns :

a=46+72+18-109

a=118+18-109

a=136-109

a=27

b=8×5:4×17

b=40:4×17

b=10×17

b=170

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4a+7b=?

4×27+7×170=?

108+7×170=?

108+1190=?

=1298