Add and Subtract Fractions Review

Add and Subtract Fractions Review

by Karen Martin

Simplify

​Look for common factors. Check for divisibility:

​2: are the last digits even?

​

​3: Add the digits, check if the sum is divisible by 3. (or sing the song)

​

​5: Are the last digits 5 or 0?

​

​9: Add the digits, check if the sum is 9

​

​10: Are the last digits 0?

Multiple Choice

Simplify  $$\frac{9}{12}$$  

• $$\frac{1}{3}$$  

• $$\frac{4}{5}$$  

• $$\frac{2}{3}$$  

• $$\frac{3}{4}$$  

Multiple Choice

Simplify  $$\frac{8}{12}$$  

• $$\frac{1}{3}$$  

• $$\frac{4}{6}$$  

• $$\frac{2}{3}$$  

• $$\frac{3}{4}$$  

Multiple Choice

Simplify  $$\frac{10}{20}$$  

• $$\frac{5}{10}$$  

• $$\frac{4}{6}$$  

• $$\frac{1}{2}$$  

• $$\frac{1}{4}$$  

​Change to a mixed number and simplify if possible:

Multiple Choice

Change to a mixed number and simplify if possible.  

$$\frac{10}{3}$$  

• $$3\frac{1}{3}$$  

• 3

• $$3\ \frac{1}{10}$$  

• $$3\ \frac{2}{3}$$  

Multiple Choice

Change to a mixed number and simplify if possible.  

$$\frac{22}{5}$$  

• $$3\frac{1}{5}$$  

• $$4\ \frac{2}{5}$$  

• $$5\ \frac{1}{2}$$  

• $$4\ \frac{2}{3}$$  

​Add Fractions and Mixed Numbers

​Make sure you have common denominators.

Add the numerators.

Keep the denominator the same.

​Add the whole numbers.

​Simplify if possible.

Multiple Choice

$$\frac{1}{10}\ +\ \frac{4}{10}$$  

• $$\frac{3}{10}$$  

• $$\frac{5}{10}$$  

• $$\frac{1}{2}$$  

• $$\frac{5}{20}$$  

Multiple Choice

$$2\frac{1}{3}\ +\ \frac{1}{2}$$  

• $$3\frac{1}{18}$$  

• $$2\frac{2}{9}$$  

• $$3\frac{5}{6}$$  

• $$2\frac{5}{6}$$  

​Subtract fractions and mixed numbers

​Make sure you have common denominators.

Make sure the 1st fraction is larger than the 2nd. If not, regroup.

​Subtract the numerators.

Keep the denominator the same.

​Subtract the whole numbers.

​Simplify if possible.

Multiple Choice

$$\frac{6}{7}\ -\ \frac{1}{14}$$  

• $$\frac{13}{14}$$  

• $$\frac{5}{14}$$  

• $$\frac{11}{14}$$  

• $$\frac{9}{14}$$  

Multiple Choice

$$5\ -\ \frac{3}{5}$$  

• $$4\ \frac{2}{5}$$  

• $$5\ \frac{3}{5}$$  

• $$5\ \frac{2}{5}$$  

• $$4\ \frac{3}{5}$$  

Multiple Choice

$$3\ \frac{4}{5}\ -\ 1\frac{3}{10}$$  

• $$2\ \frac{5}{10}$$  

• $$2\ \frac{1}{2}$$  

• $$2\ \frac{1}{5}$$  

• $$2\ \frac{1}{10}$$  

Multiple Choice

$$5\ \frac{1}{5}\ -\ 4\frac{9}{10}$$  

• $$\frac{4}{5}$$  

• $$1\ \frac{1}{5}$$  

• $$1\ \frac{3}{10}$$  

• $$\frac{3}{10}$$