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Efectuati utiziland factorul comun :
A) 3756x26+3757x75-3757
B) 4756x34-4756+4756x 67
C) 2432 x 17 - 2432 x 16 - 2432
D) 158x 432 +158x68-159x400


Răspuns :

A) 3757 × 26+3757 ×75 - 3757 = 3757× (26+75) = 3757 × 101=379457


 B) 4756 × 34 - 4756+4756× 67 = 4756 ×(34 -1+67)=4767 × 100=476700


 C) 2432 x 17 - 2432 x 16 - 2432 = 2432×(17-16-1) = 2432 × 0=0


 D) 158 × 432 +158 × 68 - 159 × 400 = 158 ×(432+158-400)=158 ×190=30020