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K-5 Grade 1 Unit 7 Lesson 9

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•K-5 Math 6-8 Math 9-12 Math

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Lesson 9

Warm-up Activity 1 Activity 2 Activity 3

Unit 7, Lesson 9

Equal Pieces

Grade 1

Warm-up

Which 3 go together?

Square, partitioned into 4 equal parts, 4 parts shaded. — A

Shape, 6 sides, made of 4 triangles of the same size. — B

Shape, made of 4 triangles of different sizes. — C

Square, partitioned into 2 shaded triangles with equal length sides. — D

Activity 1

Synthesis:

Partitioned circle.

Activity 2

Cut out 1 circle and 1 square.
Fold each shape so that there are 2 equal pieces.
Be ready to explain how you know your shape has 2 equal pieces.
Cut out 1 circle and 1 square.
Fold each shape so that there are 4 equal pieces.
Be ready to explain how you know your shape has 4 equal pieces.

Activity 3

<p>Chart, 2 groups. Split into halves, shapes with 2 equal parts. Not split into halves, shapes not partitioned into 2 equal parts.</p>

Chart, 2 groups. Split into fourths, shapes with 4 equal parts. Not split into fourths, shapes not partitioned into 4 equal parts.

Split each shape into halves.
Split each shape into fourths.
Split each shape into fourths.
Split each shape into halves.
Split each shape into halves.
Split each shape into fourths.