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Unit 1, Lesson 32

Solve put together/take apart with addend unknown math stories.

EngageNY 60 min(s)Support for English Language Learners

In this lesson, students solve "put together/take apart with addend unknown" problems (for example, "There were 8 apples in a row. 5 of them were red, and the rest were green. How many apples were green?"). They use number bonds and addition and subtraction equations (such as 5 + ___ = 8 and 8 - 5 = ___) to represent and solve each problem.

Related Lessons
Aligned Standards
Remediation Guidance
Teaching Strategies
Differentiation Strategies

Other lessons from Unit 1 in Grade 1 by EngageNY

Previous Lesson

Unit 1, Lesson 31

Solve take from with change unknown math stories with drawings.

60 min(s)

Next Lesson

Unit 1, Lesson 33

Model 0 less and 1 less pictorially and as subtraction number sentences.

60 min(s)

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2 Content Standards are aligned with this lesson

1.OA.B.4
1.OA.C.5

Major StandardsSupporting StandardsAdditional Standards

Standard 1.OA.B.4

Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.

Part of Major Cluster 1.OA.B

Prerequisites for 1.OA.B.4

Kindergarten

K.OA.A.2

Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

Upcoming Standards for 1.OA.B.4

1st Grade

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

2nd Grade

2.NBT.B.9

Explain why addition and subtraction strategies work, using place value and the properties of operations.1

4th Grade

4.NF.B.3.A

Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.

4.NF.B.3.B

Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.

4.NF.B.3.C

Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.

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