Question

Aflati trei numere consecutive a caror suma este egala cu 18. de clasa 4

Answer 1

a+b+c=18
a+a+1+a+2=18
3a+3=18
3a=18-3
3a=15
a=15:3
a=5
b=5+1
b=6
c=5+2
c=7
proba: 5+6+7=11+7=18