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Unit 4, Lesson 18

Use manipulatives to represent additions with two compositions

EngageNY 60 min(s)

In this lesson, students continue to apply place-value reasoning to add numbers within 200. They use place-value disks on a place-value chart to represent addition with the composition of 1 ten and 1 hundred. They use place-value language to explain where they make a new ten and a new hundred, as well as where to show each new unit on the place-value chart.

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Other lessons from Unit 4 in Grade 2 by EngageNY

Previous Lesson

Unit 4, Lesson 17

Use mental strategies to relate compositions of 10 tens as 1 hundred to 10 ones as 1 ten

60 min(s)

Next Lesson

Unit 4, Lesson 19

Relate manipulative representations to a written method

60 min(s)

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Unit 2, Lesson 1

Race to 200

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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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