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K-5 Grade 1 Unit 2 Lesson 7

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Lesson 7

Warm-up Activity 1 Activity 2

Unit 2, Lesson 7

One Part Red, One Part Yellow

Grade 1

Warm-up

Which 3 go together?

10 frame, 8. Top, red counters, full. Bottom, 3 red counters. — A

10 frame, 8. Top, 3 red counters, 2 yellow counters. Bottom, 3 yellow counters. — B

<p>10 frame, 6. Top, red counters, full. Bottom, 1 yellow counter.</p> — C

<p>10 frame, 8. Top, 3 yellow counters. Bottom, 5 red counters, full.</p> — D

Activity 1

None

Activity 2

Elena plays Shake and Spill.
She has 7 counters.

What are some ways to show some red and some yellow?

Show your thinking using drawings, numbers, or words.
Tyler plays Shake and Spill.
He spills these counters:

Write 2 expressions to show his counters.
Show other combinations of red and yellow counters that Tyler could spill.

Show your thinking using drawings, numbers, or words.

If you have time, solve the following problems:

What are all the combinations Elena could have?

How do you know?
What are all the combinations Tyler could have?

How do you know?

Standards Alignment

Building On

Addressing

1.OA.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

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Building Toward

1.OA.3

Apply properties of operations as strategies to add and subtract.

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Standards Alignment

Building On

Addressing

Building Toward

1.OA.3

Apply properties of operations as strategies to add and subtract.

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Standards Alignment

Building On

Addressing

1.OA.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

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Building Toward

1.OA.3

Apply properties of operations as strategies to add and subtract.

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