Curriculum / Math / 2nd Grade / Unit 2: Addition and Subtraction Within 100 / Lesson 9

Addition and Subtraction Within 100

Lesson 9

Math

Unit 2

2nd Grade

Lesson 9 of 18

Objective

Subtract a one-digit number from a two-digit number in cases that require decomposing a ten.

Student-Facing

I can subtract a one-digit number from a two-digit number.

Lesson Map

Topic A: Addition and Subtraction with Multiples of Ten or One

Lesson

Add and subtract 1 or 10 to or from two-digit numbers.

Standards

2.NBT.B.5

Lesson

Add and subtract multiples of 1 or multiples of 10 to or from two-digit numbers.

Standards

2.NBT.B.5

Topic B: Addition within 100

Lesson

Add within 100 by using a ten to make the computation easier.

Standards

2.NBT.B.5

Lesson

Add within 100 in cases that require composing a ten, comparing that to cases that do not compose a ten.

Standards

2.NBT.B.5

Lesson

Add within 100, recording that work with equations.

Standards

2.NBT.B.5

Lesson

Add within 100, recognizing when a ten will be composed.

Standards

2.NBT.B.5

Topic C: Subtraction within 100

Lesson

Subtract within 100 by using a ten to make the computation easier.

Standards

2.NBT.B.5

Lesson

Subtract within 100 in cases that do not involve decomposing a ten.

Standards

2.NBT.B.5

Lesson

Subtract a one-digit number from a two-digit number in cases that require decomposing a ten.

Standards

2.NBT.B.5

Lesson

Subtract two two-digit numbers in cases that require decomposing a ten.

Standards

2.NBT.B.5

Lesson

Subtract within 100, recording that work with equations.

Standards

2.NBT.B.5

Lesson

Subtract within 100, recognizing when a ten will be decomposed.

Standards

2.NBT.B.5

Lesson

Add and subtract within 100 and explain thinking.

Standards

2.NBT.B.52.NBT.B.9

Topic D: Word Problems and Categorical Data

Lesson

Solve compare story problems within 100.

Standards

2.NBT.B.52.OA.A.1

Lesson

Solve compare story problems within 100, particularly those that use language that suggests the “wrong” operation.

Standards

2.NBT.B.52.OA.A.1

Lesson

Collect and represent data in up to four categories.

Standards

2.MD.D.10

Lesson

Draw picture graphs to represent data. Solve problems using information presented in picture graphs.

Standards

2.MD.D.102.OA.A.1

Lesson

Draw bar graphs to represent data. Solve problems using information presented in bar graphs.

Standards

2.MD.D.102.OA.A.1

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