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Unit 1, Lesson 36

Relate subtraction from ten to corresponding decompositions.

EngageNY 60 min(s)

In this lesson, students solve using Rekenrek bracelets and number bonds to show how "partners of 10" lead to related subtraction number sentences. For example, they notice that 10 - 3 = 7 and 10 - 7 = 3 are shown in similar ways with their Rekenrek bracelets (both starting with 10, and involving a group of 3 and a group of 7), and that knowing one subtraction sentence allows them to quickly know the other.

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Other lessons from Unit 1 in Grade 1 by EngageNY

Previous Lesson

Unit 1, Lesson 35

Relate subtraction facts involving fives and doubles to corresponding decompositions.

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Unit 1, Lesson 37

Relate subtraction from nine to corresponding decompositions.

60 min(s)

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2 Content Standards are aligned with this lesson

1.OA.A.1
1.OA.C.6

Major StandardsSupporting StandardsAdditional Standards

Standard 1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Part of Major Cluster 1.OA.A

2 Math Practice Standards are aligned with this lesson

Standard MP.1

Make sense of problems and persevere in solving them.

Standard MP.7

Look for and make use of structure.

Prerequisites for 1.OA.A.1

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.A.1

1st Grade

1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

1.MD.C.4

Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.

2nd Grade

2.OA.A.1

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.