Curriculum / Math / 1st Grade / Unit 7: Adding with Place Value Within 100 / Lesson 15

Adding with Place Value Within 100

Lesson 15

Math

Unit 7

1st Grade

Lesson 15 of 18

Objective

Add a one-digit number to a two-digit number when a new ten is formed.

Student-Facing

I can add ones to a number to make a new ten.

Lesson Map

Topic A: Add and Subtract Tens

Lesson

Add 10 to a multiple of 10.

Standards

1.NBT.C.41.NBT.C.5

Lesson

Subtract 10 from a multiple of 10.

Standards

1.NBT.C.51.NBT.C.6

Lesson

Add multiples of 10 to other multiples of 10.

Standards

1.NBT.C.4

Lesson

Subtract multiples of 10 from multiples of 10.

Standards

1.NBT.C.6

Lesson

Add 10, or a multiple of 10, to a two-digit number.

Standards

1.NBT.C.41.NBT.C.5

Lesson

Subtract 10 from a two-digit number.

Standards

1.NBT.C.5

Topic B: Add and Subtract Within 20 Using Place Value

Lesson

Add a one-digit number to a teen number, increasing the number of ones while the tens remain the same.

Standards

1.NBT.C.41.OA.B.31.OA.C.6

Lesson

Solve story problems within 20 involving adding a one-digit number to a teen number.

Standards

1.OA.A.11.OA.B.4

Lesson

Subtract a one-digit number from a teen number, decreasing the number of ones while the tens remain the same.

Standards

1.NBT.C.41.OA.C.6

Lesson

Solve story problems within 20 involving subtracting a one-digit number from a teen number.

Standards

1.OA.A.1

Lesson

Apply place value understanding to add to and subtract from teen numbers.

Standards

1.NBT.C.41.OA.B.4

Topic C: Add Within 100 Using Tens and Ones

Lesson

Compose and decompose two-digit numbers into tens and ones to show the same value in different ways.

Standards

1.NBT.A.11.NBT.B.2.A1.NBT.C.4

Lesson

Add a one-digit number to a two-digit number when no new ten is formed.

Standards

1.NBT.C.4

Lesson

Add two-digit numbers when no new ten is formed.

Standards

1.NBT.C.4

Lesson

Add a one-digit number to a two-digit number when a new ten is formed.

Standards

1.NBT.C.4

Lesson

Add 2 two-digit numbers when a new ten is formed.

Standards

1.OA.B.4

Lesson

Compare the totals of two-digit addition problems by reasoning about the number of tens and ones.

Standards

1.NBT.B.31.NBT.C.4

Lesson

Add within 100.

Standards

1.NBT.C.41.NBT.C.5

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