Question

ema,victorsi daria au folosit penru un experiment 217 cuburi de gheata.ema si victor au folosit 158 de cubui,iar victor si daria 144 de cuburi.
cate cuburi a folosit fiecare copil?(rezolva in doua moduri)

Answer 1

217+158+144=509. 509-144=365

Answer 2

e+v+d=217
e+v=158
v+d=144
158+d=217
d=217-158
d=59
e+144=217
e=217-144
e=73
v=217-132
v=85