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Kitty105
a fost răspuns

calculeaza 3x+7×-8× stiind ca: a) ×=12; b) ×=5; c) ×=100.

Răspuns :

a) 3x12+7x12-8x12= 36+84-96=120-96= 24
b)3x5+7x5-8x5= 15+35-40= 50-40=10
c)3x100+7x100-8x100= 300+700-800=1000-800=200
Diancik2012
3x+7x-8x=2x
a)2*12=24
b)2*5=10
c)2*100=200