Question

What is the value of the expression? –13.7+(–5+2.7)

a. –21.4
b. –16
c. –11.4
d. –6

Answer 1

`-13.7+(-5+2.7)=-13.7+(2.7+(-5))\\\\=-13.7+(2.7-5)=-13.7+(-2.3)=-(13.7+2.3)\\\\=\boxed{-16}\leftarrow\boxed{b.}`

Answer 2

-13.7 + (-5 + 2.7)

First, simplify -5 + 2.7 to -2.3 / Your problem should look like:
`-13.7 + -2.3`
Second, simplify to get rid of the addition. / Your problem should look like:
`-13.7 - 2.3`
Third, subtract. / Your problem should look like:
`-16`

Answer: -16 (B)