Adding and Subtracting Like Fractions
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Objective
I can add and subtract fractions with like denominators.
Part 1 of 3
Key concepts
3 concepts
- 1
In a fraction like 1/8, the bottom number is called the denominator and tells us the total number of equal pieces. The top number is called the numerator and tells us how many pieces we have.
- 2
When fractions have the same bottom number, they have like denominators. To add these fractions, you just add the top numbers and keep the bottom number the same.
- 3
To subtract fractions with like denominators, you subtract the top numbers and keep the bottom number the same.
Part 2 of 3
Practice
3 questions
In the fraction 2/8, what does the number 8 (the denominator) tell you?
You have a chocolate bar cut into 7 equal pieces. You eat 2/7 of the bar, and your friend eats 3/7 of the bar. What fraction of the chocolate bar did you both eat in total?
Part 3 of 3
Exit ticket
Quick comprehension check
“A cake is cut into 9 equal slices. You eat 4/9 of the cake. Your brother eats 2/9 of the cake. a) How much cake did you and your brother eat in total? b) How much cake is left from the whole cake (9/9) after you both ate your slices?”
Sample answer included in the free materials
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