Respostas

A melhor resposta!
2014-08-24T15:18:38-03:00
A) 70+60=130
180-130=50
×=50

b)50+90=140
180-140=40

c)45+65= 110
180-110=70
180-70=110
×=110

d)50+10=60
180-60=120
180-120=60
x=60

e) ×+10+×+10+×=180
3×=180-20
3×=160
×=160/3

f)70+70=140
180-140
×=40


:)


1 5 1