Question

Me ajude!
calcule:
a)(+7)+(+3)=
b)(+10)-(+8)=
c(+2).(5)
3 7
d)(-42).(-7)=
e) (-100):(+50)=
f) + 7 : (-4)=
3 5

Answer 1

a) 10
b) 2
c) 10
d) +294
e) -2
f) -1,75