Question

folosind asociativitate si comutativitatea adunării ,calculați sumele:
a)S=3+12+45+97+17+83+55+88+100;
b)S=200+175+113+37+25+87+163;
c)S=19+32+58+91+42+81+55+9+100.
mă puteți ajuta dau coroniță ​

Answer 1

Răspuns:

S=3+12+45+97+17+83+55+88+100

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

S=100+100+100+100+100

S=500

_______

S=200+175+113+37+25+87+163

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

S=200+200+200+200

S=800

______

S=19+32+58+91+42+81+55+9+100

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

S=100+100+100+100+87

S=487