Home > CC2MN > Chapter 7 > Lesson 7.1.1 > Problem7-8

7-8.

Simplify the following expressions.

1. $-\frac{3}{4}-\frac{2}{5}$

Find a common denominator.

$-\frac{23}{20}$

1. $\frac{7}{8}-\frac{2}{3}$

Find a common denominator.

1. $\frac{1}{3}-\frac{5}{6}$

See part (b).

1. $1\frac{2}{3}+(-\frac{2}{5})$

Recall that adding a negative number is essentially subtraction.

1. $\frac{4}{7}-(-\frac{3}{8})$

Remember that when you subtract a negative number you are essentially adding it.

$\frac{53}{56}$

1. $-4\frac{1}{2}+3\frac{1}{9}$

Remember, the solution will have the same sign as the larger number.

$-1\frac{7}{18}$