Question

exercitiul 1 va rog ajutatu.ma dau cororna, dar sa utilizati factorul comun

Answer 1

a)12*7+12*3=12(7+3)=12*10=120
b)6*10+12*10+17*10-10(6+12+17)=10*35=350
c)14*22-14*10-14=14(22-10-1)=14*11=154
d)5*35+5*70-5*5=5(35+70-5)=5*5=25
e)43*275+57*275=275*(43+57)=275*100=27500
f)175*123+27*123-102*123=123(175+27-102)=123*100=12300

Answer 2

a)84+36=120 b)60+120+170=350 c)308-140-14=154 d)175+350-25=500 e)11825+15675=27500f)21525+3321-12546=12300.