Fraction Operation Lesson

Fraction Operations Review

By LK Stewart

ADDING FRACTIONS

It's not that bad. :)

If the denominators are the same, you're good to go.​

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Adding Fractions

​Some text here about the topic of discussion.

REMEMBER TO SIMPLIFY!

Multiple Choice

$$\frac{3}{5}+\frac{1}{5}=$$  

• $$\frac{4}{10}$$  

• $$\frac{4}{5}$$  

• $$\frac{3}{25}$$  

• $$\frac{3}{5}$$  

Multiple Choice

$$\frac{2}{9}+\frac{5}{9}$$  

• $$\frac{7}{18}$$  

• $$\frac{7}{9}$$  

• $$\frac{10}{18}$$  

• $$\frac{10}{9}$$  

What if they have different denominators?

Find a common factor and multiply to get equal denominators.

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*If you're not sure, multiply the bottom and top by the opposite denominator!

Multiple Choice

$$\frac{3}{4}+\frac{1}{6}$$  

• $$\frac{4}{10}$$  

• $$\frac{2}{5}$$  

• $$\frac{11}{12}$$  

• $$\frac{7}{12}$$  

Multiple Choice

$$\frac{1}{12}+\frac{5}{6}$$  

• $$\frac{1}{3}$$  

• $$\frac{5}{12}$$  

• $$\frac{6}{18}$$  

• $$\frac{11}{12}$$  

If the denominators are the same, you're good to go.​

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Subtracting Fractions

Multiple Choice

$$\frac{19}{20}-\frac{12}{20}$$  

• $$\frac{6}{20}$$  

• $$\frac{7}{0}$$  

• $$\frac{0}{20}$$  

• $$\frac{7}{20}$$  

What if they have different denominators?

Find a common factor and multiply to get equal denominators.

​

*If you're not sure, multiply the bottom and top by the opposite denominator!

Multiple Choice

When adding or subtracting fractions, I NEVER add or subtract the...

• numerators

• denominators

• mixed numbers

• equivalent fractions

Multiple Choice

When the denominators are not the same, I must find a...

• common numerator

• common denominator

• equivalent fraction

• mixed number

Multiple Choice

What is the least common denominator of 6/8 and 4/12?

• 12
• 24
• 8
• 16

Multiple Choice

  $$\frac{19}{20}-\frac{3}{10}=$$  

• $$\frac{15}{20}$$  

• $$\frac{22}{20}$$  

• $$\frac{13}{20}$$  

• $$\frac{16}{10}$$  

Multiple Choice

$$\frac{8}{9}-\frac{2}{3}$$  

• $$\frac{6}{6}$$  

• $$\frac{6}{9}$$  

• $$\frac{2}{9}$$  

• $$\frac{4}{9}$$  

Multiple Choice

$$\frac{11}{15}-\frac{2}{5}$$  

• $$\frac{3}{5}$$  

• $$\frac{9}{10}$$  

• $$\frac{5}{10}$$  

• $$\frac{1}{3}$$  

Multiply straight across and simplify.

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Multiplying

Fractions

Multiple Choice

Calculate $$\frac{3}{5\ }\times\left(\frac{1}{3}\right)$$  

• $$\frac{3}{15}$$  

• $$\frac{15}{3}$$  

• $$\frac{5}{1}$$  

• $$\frac{1}{5}$$  

Multiple Choice

$$20\times\frac{3}{10}=$$  

• $$20$$  

• $$\frac{20}{10}$$  

• $$15$$  

• $$\frac{60}{10}\ or\ 6$$  

Multiple Choice

$$\frac{2}{3}\times\frac{4}{9}=$$  

• $$\frac{12}{50}$$  

• $$\frac{8}{27}$$  

• $$\frac{6}{12}$$  

• $$3$$  

Multiple Choice

$$\frac{1}{5}\times25=$$  

• $$\frac{25}{5}\ or\ 5$$  

• $$\frac{1}{5}$$  

• $$2$$  

• $$\frac{1}{3}$$  

Keep Change Flip

Multiply

Simplify

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Dividing

Fractions

Multiple Choice

Calculate $$\frac{3}{4}\div\frac{2}{5}$$  

•   $$1\ \frac{7}{8}$$

• $$\frac{6}{20}$$  

• $$\frac{3}{8}$$

• $$\frac{8}{15}$$

Multiple Choice

$$\frac{11}{12}\div\frac{1}{2}$$  

• $$\frac{11}{12}\times\frac{1}{2}$$  

• $$\frac{12}{11}\times\frac{1}{2}$$  

• $$\frac{11}{12}\times\frac{2}{1}$$  

• $$\frac{12}{11}\times\frac{2}{1}$$  

Multiple Choice

$$\frac{2}{5}\div\frac{4}{7}$$  

• $$\frac{2}{5}\times\frac{7}{4}$$  

• $$\frac{2}{5}\times\frac{4}{7}$$  

• $$\frac{5}{2}\times\frac{4}{7}$$  

• $$\frac{5}{2}\times\frac{7}{4}$$  

Multiple Choice

Solve.

• 2
• 4
• 1
• 1/8