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efectueaza grupand convenabil termeni

Efectueaza Grupand Convenabil Termeni class=

Răspuns :

a) (10+20+30)+(15+25)= 60+40=100
b) (50+100+150)+(75+125)=300+200=500
c) (2500+3500)+(782+218)=6000+1000=7000
d) (2400+3600)+(520+80)=6000+600=6600