### Home > CC1 > Chapter 3 > Lesson 3.2.3 > Problem3-118

3-118.

Simplify the following expressions. Show your work.

1. $8.23+10.9$

• Remember to align the decimal points when adding the terms.

• $19.13$

1. $−6−9$

• You can think of this as
$−1(6+9)$.

1. $8−3−4$

• $5−4$

1. $0−3$

• $−3$

1. $15−20$

• The answer should be negative.

1. $−9+14$

• This answer should be positive. Why?

1. $\frac { 11 } { 15 } - \frac { 7 } { 20 }$

• $\frac{11}{15}-\frac{7}{20}=\frac{44}{60}-\frac{21}{60}$

• $\frac{44-21}{60}=\frac{23}{60}$

• $\frac{23}{60}$

1. $5−9$

• −4