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Unit 4, Lesson 19

Relate manipulative representations to a written method

EngageNY 60 min(s)

In this lesson, students apply their understanding of place-value strategies for addition as they move from concrete to pictorial representation. They relate manipulatives to the vertical form, recording compositions as new groups below. Students use place-value language to express the action as they physically make 1 ten with 10 ones disks and 1 hundred with 10 tens disks. Working as partners, one student records each change on the vertical form step by step as the other partner moves the manipulatives.

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Other lessons from Unit 4 in Grade 2 by EngageNY

Previous Lesson

Unit 4, Lesson 18

Use manipulatives to represent additions with two compositions

60 min(s)

Next Lesson

Unit 4, Lesson 20

Use math drawings to represent additions with up to two compositions and relate drawing...

60 min(s)

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3 Content Standards are aligned with this lesson

2.NBT.B.7
2.NBT.B.8
2.NBT.B.9

Major StandardsSupporting StandardsAdditional Standards

Standard 2.NBT.B.7

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

Part of Major Cluster 2.NBT.B

1 Math Practice Standard is aligned with this lesson

Standard MP.4

Model with mathematics.

Prerequisites for 2.NBT.B.7

2nd Grade

2.NBT.A.1

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

2.NBT.A.1.A

100 can be thought of as a bundle of ten tens - called a "hundred."

2.NBT.A.1.B

The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).

Upcoming Standards for 2.NBT.B.7

2nd Grade

2.NBT.B.6

Add up to four two-digit numbers using strategies based on place value and properties of operations.

3rd Grade

3.NBT.A.2

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

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