Question

Efetue a seguir : a) - 8 + 7 - 2 + 5 - 4 - 10 + 16 - 5 - 7 + 18 - 10 =

b) (+5) -(+6) + (-8) - (-4) + (+10) - (-6) =

Answer 1

a) -8+7-2+5-4-10+16-5-7+18-10

-1-2+5-4-10+16-5-7+18-10

-3+5-4-10+16-5-7+18-10

+2-4-10+16-5-7+18-10

-2-10+16-5-7+18-10

-12+16-5-7+18-10

+4-5-7+18-10

-1-7+18-10

-8+18-10

+10-10=0

b) (+5)-(+6)+(-8)-(-4)+(+10)-(-6)=

+5-6-8+4+10+6

-1-8+4+10+6

-9+4+10+6

-5+10+6

+5+6= 11