G1 U2 L1 SJ

Understand Numbers to 20

Base ten blocks:

1 tens = 10

6 ones = 6

1 tens + 6 ones = 16

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Grade 1 Unit 2 Lesson 1 C SJ

Tens

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Ones

Grade 1 Unit 2 Lesson 1 C SJ

Applied MP

MPs * Embedded MP

Conceptual Lesson Grade 1 · Unit 2 · Lesson 1

1

*

MC: 1.NBT.2

2

3

*

4

5

6

7

 *

Today, I will build whole numbers to 20 with base ten blocks.

Vocabulary

Steps

Base ten blocks:

1. Identify the number in the tens place. Build it and record how many. 2. Identify the number in the ones place. Build it and record how many.

1 tens = 10

6 ones = 6

3. Count by tens and then by ones. Record the whole number

1 tens + 6 ones = 16

Copyright © Swun Math

Grade 1 Unit 2 Lesson 1 C SJ

8

*

/ Directions: Use base ten blocks to build numbers to 20.

1. Build the number 19 with base ten blocks. Record the whole number.

tens +

ones =

2. Build the number 17 with base ten blocks. Record the whole number.

tens +

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ones =

Grade 1 Unit 2 Lesson 1 C SJ

Directions: Use base ten blocks to build numbers to 20.

1. Build the number 18 with base ten blocks. Record the whole number.

tens +

ones =

2. Build the number 16 with base ten blocks. Record the whole number.

tens +

ones =

*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: MP1: What steps were used today? MP5: How did the manipulatives help you understand the problem? MP8: Did you use any shortcuts to solve the problems?

Copyright © Swun Math

Grade 1 Unit 2 Lesson 1 C SJ