Grade 1 · Math · Addition

1st Grade Addition Within 20 worksheets

6 printable versionsBuilding ConfidenceAbout 4 minutes eachFree · no account

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Addition Within 20

Grade 1 Math Worksheet - Building Confidence

NameDate

Write the answer on the line.

9 + 5 =
7 + 4 =
9 + 3 =
4 + 9 =
6 + 5 =
10 + 4 =
9 + 2 =
10 + 2 =
8 + 5 =
5 + 7 =
6 + 8 =
9 + 4 =
7 + 7 =
6 + 6 =
7 + 6 =
10 + 3 =
3 + 8 =
8 + 4 =

1st Grade Addition Within 20 worksheet 1 – printable PDF — Download PDF: 1 2 3 4 5 6

About this worksheet

Adding within twenty is where first graders move from counting on to using strategies: making a ten, using doubles and thinking of facts they already know. The fastest way to build that is a lot of plain practice with the number sentence itself. This worksheet is a clean page of addition sentences in one shape: two numbers, a plus sign and a line for the sum.

There are no pictures, no true or false and no word problems on this page, so your child does one thing the whole way down. Support sheets use totals from 11 to 14, standard sheets go to 18, and challenge sheets stay between 15 and 20. If a fact stalls, ask your child to make a ten first, for example 8 + 6 is 8 + 2 + 4.

What your child will learn

Add two numbers with a total up to 20
Make a ten to add: 8 + 6 is 8 + 2 + 4
Use doubles and near doubles
Recall small addition facts from memory

Common Core standard: 1.OA.C.6

Worked example

8 + 6: take 2 from the 6 to make 10 with the 8, then add the 4 that is left. 10 + 4 = 14. Write 14.

Common mistake

Counting every number from one instead of starting at the bigger number or making a ten.

Helpful hint

Start at the bigger number, or make a ten first.

Next skill: Subtraction Within 20 Earlier: Subtraction Within 10

Questions parents ask

What is the most common mistake with addition within 20?

Counting every number from one instead of starting at the bigger number or making a ten.

How can I help my child with addition within 20?

Start at the bigger number, or make a ten first.

Are these 1st grade math worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

More 1st grade addition

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