Adding and Subtracting Fractions and Mixed Numbers (Same Denominator)

Adding and Subtracting Fractions and Mixed Numbers (Same Denominator)

Lesson #54

​Review parts of a fraction:

​The numerator is the number on top.

​

​The denominator is the number on the bottom.

Multiple Choice

What is the 5 in this fraction?

$$\frac{4}{5}$$  

• numerator

• denominator

Multiple Choice

What is the 3 in this fraction?

$$\frac{3}{8}$$  

• numerator

• denominator

​Adding fractions with like denominators

​If you are adding fractions with like denominators, all you need to do is add the numerators and keep the denominator the same.

Multiple Choice

$$\frac{1}{5}+\frac{3}{5}=$$  

• $$\frac{4}{10}$$  

• $$\frac{4}{5}$$  

Multiple Choice

$$\frac{4}{9}+\frac{1}{9}=$$  

• $$\frac{5}{9}$$  

• $$\frac{5}{18}$$  

​Subtracting fractions with like denominators

​If you are subtracting fractions with like denominators, all you need to do is subtract the numerators and keep the denominator the same.

Multiple Choice

$$\frac{7}{8}\ -\ \frac{4}{8}=$$  

• $$\frac{11}{16}$$  

• $$\frac{3}{8}$$  

• $$\frac{11}{8}$$  

• $$\frac{3}{0}$$  

Multiple Choice

$$\frac{4}{5}\ -\ \frac{3}{5}=$$  

• $$\frac{7}{10}$$  

• $$\frac{1}{0}$$  

• $$\frac{1}{5}$$  

• $$\frac{7}{10}$$  

​Adding & Subtracting Mixed Numbers with like Denominators

​Do the same as you would if you were adding or subtracting fractions with like denominators.

Multiple Choice

$$3\frac{1}{4}\ +\ 5\frac{2}{4}\ =$$  

• $$\frac{3}{4}$$  

• $$8$$  

• $$8\ \frac{2}{4}$$  

• $$8\ \frac{3}{4}$$  

Multiple Choice

$$4\ \frac{4}{5}\ +3\ \frac{2}{5}$$  

• $$7\ \frac{1}{5}$$  

• $$7\ \frac{4}{5}$$  

• $$8\ \frac{1}{5}$$  

• $$8$$  

Multiple Choice

$$5\ \frac{3}{8}\ -2\ \frac{1}{8}$$  

• $$7\ \frac{4}{8}$$  

• $$3\ \frac{2}{8}$$  

• $$3$$  

• $$3\ \frac{4}{8}$$