Question

folosind asociativitatea si comutativitatea adunarii ,calculati sumele:
S=3+12+45+97+17+83+55+88+100 Si
S=200+175+113+37+25+87+163 Si
S=19+32+58+91+42+81+55+9+100
va rog ajutatima

Answer 1

a) 3+12+45+97+17+83+55+88+100 =

(17+83)+(97+3)+(45+55)+(12+88)+100=500

b) 200+175+113+37+25+87+163 =

(175+25)+(113+87)+(163+37)+200=800

c)19+32+58+91+42+81+55+9+100=

100+(91+9)+(19+81)+(58+42)+55+32=487