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Unit 4, Lesson 14

Represent subtraction with and without the decomposition when there is a three-digit minuend

EngageNY 60 min(s)

In this lesson, students continue to deepen their understanding of subtraction by relating their drawings to the subtraction algorithm working with the chip model on their place-value chart. They decompose a ten and relate it to vertical form. Students subtract a two-digit subtrahend from a three-digit minuend, for example 164 - 36. This provides practice working with and drawing three-digit numbers without the complexity of decomposing a hundred.

Related Lessons
Aligned Standards
Remediation Guidance
Teaching Strategies
Differentiation Strategies

Other lessons from Unit 4 in Grade 2 by EngageNY

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Unit 4, Lesson 13

Use math drawings to represent subtraction with and without decomposition and relate dr...

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Unit 4, Lesson 15

Represent subtraction with and without the decomposition when there is a three-digit mi...

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2 Content Standards are aligned with this lesson

2.NBT.B.7
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.6

Attend to precision.

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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