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a) {1+[25-3×(12×4-43)]×5}×4

b) 6×{[(75-5×13)×5-43]×7+1}


Răspuns :

Răspuns:

a)[1+(25-3×5)×5]×4

(1+10×5)×4

51×4=204

b)6×[(10×5-43)×7+1]

6×(7×7+1)

6×50=300