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Fractions With Like Denominators

Presentation transcript:

Splash Screen

Five-Minute Check (over Lesson 10–1) Main Idea Example 1: Subtract Like Fractions Key Concept: Subtract Like Fractions Example 2: Subtract Like Fractions Example 3: Subtract Like Fractions Lesson Menu

I will subtract fractions with like denominators. Main Idea/Vocabulary

Subtract Like Fractions Find – . Use models to check. 9 10 6 10 9 10 6 9 – 6 – = 10 10 3 = Subtract. 3 10 Answer: So, – = . 9 10 6 3 Example 1

Find – . 7 11 3 A. 1 11 B. 3 10 C. 4 11 A B C D D. 3 Example 1

KC 1

Subtract Like Fractions Robert used teaspoon of salt and teaspoon of pepper in a recipe. How much more salt did he use than pepper? Write in simplest form. 3 4 1 Subtract the amount of pepper in the recipe from the amount of salt. Example 2

Subtract Like Fractions 3 4 1 4 3 – 1 – = Subtract the numerators. 4 2 4 = Simplify. 2 ÷ 2 Divide the numerator and denominator by the GCF, 2. = 4 ÷ 2 1 2 = Simplify. Check by drawing a picture. Answer: So, Robert used teaspoon more salt than pepper. 1 2 Example 2

Melanie used cup of milk and cup of flour in a recipe Melanie used cup of milk and cup of flour in a recipe. How much more milk did she use than flour? 4 6 1 A. cup 1 3 B. cup 1 2 A B C D C. cup 2 3 D. cup 1 6 Example 2

Subtract Like Fractions Nadia used foot of string for a necklace and Kate used foot of string. How many fewer feet of string did Kate use than Nadia? Write in simplest form. 11 12 8 Subtract the amount of string that Kate used from the amount of string that Nadia used. Example 3

Subtract Like Fractions 11 12 8 12 11 – 8 – = Subtract the numerators. 12 3 12 = Simplify. 3 ÷ 3 Divide the numerator and denominator by the GCF, 3. = 12 ÷ 3 1 4 = Simplify. Check by drawing a picture. Answer: So, Kate used foot less string than Nadia. 1 4 Example 3

Find – . Which is the answer in simplest form? 7 10 1 A. 6 10 B. 3 5 C. 1 4 A B C D D. 2 3 Example 3

End of the Lesson End Lesson

Five-Minute Check (over Lesson 10–1) Image Bank Math Tool Chest Add Like Fractions Resources

A. B. C. D. 3 10 5 15 4 5 3 5 (over Lesson 10–1) A B C D Five Minute Check 1

A. B. C. D. 5 7 5 14 3 14 2 7 (over Lesson 10–1) A B C D Five Minute Check 2

A. B. C. D. 4 12 1 3 2 3 6 12 (over Lesson 10–1) A B C D Five Minute Check 3

A. B. C. D. 4 12 1 3 3 4 2 3 (over Lesson 10–1) A B C D Five Minute Check 4

A. B. C. 1 D. 9 18 1 2 2 3 (over Lesson 10–1) A B C D Five Minute Check 5

A. 1 B. C. D. 1 2 3 6 8 3 4 1 2 (over Lesson 10–1) A B C D Five Minute Check 6

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