Skill Practice
Solve: 3/8 + 2/8
5/8
Describe what to do when adding fractions with like denominators.
Add the numerators and keep the denominator the same.
Mrs. Lee had 11/12 of a tank of gas. She used 4/12. How much gas is left?
7/12
Write an equivalent fraction for 6/6
1 whole, or any fraction equal to 1 whole (the numerator and denominator must be the same)
Solve: 7/10 - 4/10
3/10
True or False: When subtracting fractions with like denominators, the denominator changes.
False — the denominator stays the same when adding or subtracting fractions
A pizza was cut into 8 slices. Mia ate 2 slices and Noah ate 1 slice. What fraction of the pizza is left over?
5/8
Draw a model to show 2/3 - 1/3. Write and box your final answer.
Any model that accurately shows the given problem (fraction bar, number line, etc.)
Answer: 1/3
Solve 9/12 - 5/12. Then, write your answer as an equivalent fraction.
4/12 = 1/3 = 8/24
George added 2/5 + 1/5 and got 3/10. Do you agree or disagree? Explain.
Disagree. He should not have added the denominators. The correct answer is 3/5.
Jen has 4/10 of a kilogram of dog food. Luis has 3/10 of a kilogram of dog food. A large dog eats 2/10 of a kilogram in one meal. How much dog food do Jen and Luis have altogether?
7/10
Fill in the missing number 6/10 + ? = 9/10
3/10
Solve 7/8 + 5/8. Then, write your answer two different ways.
12/8 = 1 4/8 = 1 1/2
Compare 4/10 and 4/100 using <, >, or =. Be prepared to explain how you know.
4/10 > 4/100
The bigger the denominator, the smaller the piece. The smaller the denominator, the bigger the piece.
tenths > hundredths
Jen has 4/10 of a kilogram of dog food. Luis has 3/10 of a kilogram of dog food. A large dog eats 2/10 of a kilogram in one meal. How much more dog food does Jen have than Luis?
1/10
Use a model to show 1/10 + 3/10 + 4/10. Write and box your final answer.
Any model that accurately shows the given problem (fraction bar, number line, etc.)
Answer: 8/10
Solve 15/10 - 4/10. Then, write your answer two different ways.
11/10 = 1 1/10
Rob had a large pizza and a small pizza. He cut each pizza into fourths. He took one fourth from each pizza and used the following problem to show their sum: 1/4 + 1/4 = 2/4. Why is Rob incorrect?
The pizzas are different sizes, so he cannot add 1/4 of the large pizza + 1/4 of the small pizza since the size of the wholes are not the same.
Jen has 4/10 of a kilogram of dog food. Luis has 3/10 of a kilogram of dog food. A large dog eats 2/10 of a kilogram in one meal. If they use all the dog food they have, how many meals can they feed to the dog?
3 meals
Lena says 7/8 - 3/4 = 4/4.
Do you agree or disagree? Explain why.
Disagree. You cannot subtract 7/8 and 3/4 since they have different denominators. You first need to find an equivalent fraction with a common denominator, and then subtract the numerators while keeping the denominator the same.