Question

106 Calculează grupând convenabil termenii. a) 340+530+160+70; b) 130+420+280+ 170; c) 120+130+140+180+170+160; d) 127+152 +13+18+42+15+58+85.​

Answer 1

Explicație pas cu pas:

buna! Ai rezolvarea in poza.

Answer 2

Răspuns:

a) 340+530+160+70=(340+160)+(530+70)=500+600=1100

b) 130+420+280+170=(130+170)+(420+280)=300+700=1000

c) 120+130+140+180+170+160=

    =(120+180)+(130+170)+(140+160)=300+300+300=900

d) 127+152 +13+18+42+15+58+85= (127+13)+(152+18)+(42+58)+(15+85)=

    =140+170+100+100=510