Question

Folosind asociativitatea si comutativitatea adunarii,ca
lculati sumele ​

Answer 1

Răspuns:

a) S= (4+96)+(77+23)+(46+54)+(81+19)+100= 100+100+100+100+100=500

b)S= 400+(275+25)+(331+169)+(60+40)= 400+300+500+100=(400+100)+500+300=(500+500)+300= 1000+300=1300

c) S= (29+71)+(62+38)+(48+52)+(99+1)+100= 100+100+100+100+100=500

d)S= 40+73+87+21+113+66= (40+73+87)+(21+113+66)=200+ 200=400