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K-5 Grade 5 Unit 6 Lesson 10

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•K-5 Math 6-8 Math 9-12 Math

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Lesson 10

Warm-up Activity 1 Activity 2

Unit 6, Lesson 10

All Sorts of Denominators

Grade 5

Warm-up

How many do you see? How do you see them?

Two diagrams, both squares with length and width, 1. Each partitioned into 3 rows of 4 of the same size rectangles. On left, 8 rectangles shaded. On right, 3 rectangles shaded.

Activity 1

Find the value of each expression. Show your thinking. Organize your work so it can be followed by others.

Activity 2

Here is Lin’s strategy for finding the value of : “I know is a common denominator so I’ll use that.” Does Lin’s strategy for finding a common denominator work? Explain or show your reasoning. Then find the value of .
Find the value of each expression.

Standards Alignment

Building On

Addressing

5.NF.1

Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)

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Building Toward

Standards Alignment

Building On

Addressing

5.NF.1

Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)

View Full Standard

Building Toward

Standards Alignment

Building On

Addressing

5.NF.1

Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)

View Full Standard

Building Toward