G1 U9 L14 SJ

Applied MP

MPs * Embedded MP

Conceptual Lesson Grade 1 · Unit 9 · Lesson 14

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MC: 1.OA.6

Today, I will subtract by decomposing a number leading to a ten.

Vocabulary

Notes

Minuend: the first number Subtrahend: the second number Difference: the answer Ex. 16-7=9 16 is the minuend 7 is the subtrahend 9 is the difference

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Grade 1 Unit 9 Lesson 14 C SJ

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Directions: Each pair of students needs a number line and a white board.

1.

18 — 9 =

0

2.

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9

10

11 12 13 14 15 16 17 18 19 20

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10

11 12 13 14 15 16 17 18 19 20

17 — 9 =

0

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2

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3

Grade 1 Unit 9 Lesson 14 C SJ

Directions: Solve

1. 16 — 9 =

0

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10

11 12 13 14 15 16 17 18 19 20

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10

11 12 13 14 15 16 17 18 19 20

2. 15 — 7 = 0

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*MP3: Do you agree/disagree with what

said?

*MP6: How do you know your answers are correct/reasonable?

Recap today’s lesson with one or more of the following MP questions: MP5: What tool did you use to help you solve the problem? MP7: What concepts or rules help you solve this problem? MP8: What strategies did you use to help solve the problem?

Copyright © Swun Math

Grade 1 Unit 9 Lesson 14 C SJ

Copyright © Swun Math

Grade 1 Unit 9 Lesson 14 C SJ