FluentFacts
Include Zero (0) Facts

Allow 0 as an addend (e.g. 4 + 0 = 4)

Seed #42 · 20 Facts
8.5" × 11" Letter Preview·20 Facts·vertical layout

Addition Facts Within 20 Worksheets

Solve each math problem carefully. Check your answers when finished!

Name:
Date: 
Score:/ 20
Time: 
1)
7
+5
_
2)
9
+7
_
3)
2
+6
_
4)
3
+7
_
5)
9
+5
_
6)
3
+9
_
7)
8
+4
_
8)
7
+7
_
9)
1
+5
_
10)
9
+1
_
11)
6
+1
_
12)
3
+1
_
13)
2
+8
_
14)
2
+9
_
15)
5
+9
_
16)
4
+5
_
17)
1
+1
_
18)
6
+6
_
19)
3
+4
_
20)
8
+9
_
Fluent Facts·Free Math Fact Fluency Worksheet Generator
worksheets.fluentfacts.com·Page 1 of 2

[ANSWER KEY] Addition Facts Within 20 Worksheets

Solve each math problem carefully. Check your answers when finished!

Name:Answer Key
Date: 
Score:20/ 20
Time: 
1)
7
+5
12
2)
9
+7
16
3)
2
+6
8
4)
3
+7
10
5)
9
+5
14
6)
3
+9
12
7)
8
+4
12
8)
7
+7
14
9)
1
+5
6
10)
9
+1
10
11)
6
+1
7
12)
3
+1
4
13)
2
+8
10
14)
2
+9
11
15)
5
+9
14
16)
4
+5
9
17)
1
+1
2
18)
6
+6
12
19)
3
+4
7
20)
8
+9
17
Fluent Facts·Free Math Fact Fluency Worksheet Generator
worksheets.fluentfacts.com·Page 2 of 2
Page 2 Preview (Answer Key):Will automatically print on page 2

[ANSWER KEY] Addition Facts Within 20 Worksheets

Solve each math problem carefully. Check your answers when finished!

Name:Answer Key
Date: 
Score:20/ 20
Time: 
1)
7
+5
12
2)
9
+7
16
3)
2
+6
8
4)
3
+7
10
5)
9
+5
14
6)
3
+9
12
7)
8
+4
12
8)
7
+7
14
9)
1
+5
6
10)
9
+1
10
11)
6
+1
7
12)
3
+1
4
13)
2
+8
10
14)
2
+9
11
15)
5
+9
14
16)
4
+5
9
17)
1
+1
2
18)
6
+6
12
19)
3
+4
7
20)
8
+9
17
Fluent Facts·Free Math Fact Fluency Worksheet Generator
worksheets.fluentfacts.com·Page 2 of 2

Made for everyday practice

Addition Facts Within 20 Worksheets

Practice addition with sums no greater than 20. This generator starts with 20 problems and positive addends; adjust the settings to include zero or change the page layout.

Free to use, with no account required. Customize the worksheet above, include an answer key, and print or save your math facts practice as a PDF.

When to move to the next step

When learners use strategies comfortably, mix addition and subtraction. Ask them to check a sum with a related subtraction fact.

Use ten as a stepping stone

Connect known sums within 10 to larger sums. When a fact crosses 10, split one addend to complete 10 first, then add what remains.

For 8 + 5, split 5 into 2 and 3: 8 + 2 makes 10, then 10 + 3 makes 13.

How to print or save as PDF

  1. Choose your operation, difficulty, and number of problems above.
  2. Use Shuffle for fresh facts. Turn on “Print Answer Key Page” if you want a separate answer page.
  3. Select “Print Worksheet.” Choose your printer or your browser’s “Save as PDF” destination.

Designed for US Letter paper. Check the print preview and turn off browser headers and footers for a cleaner worksheet.

Keep practicing with FluentFacts

Try these same facts on screen, or explore a related operation. Connect addition with subtraction and multiplication with division to reinforce the relationships.

Practice these facts on screenExplore related facts →

Worksheet questions

Is this math facts generator free?

Yes. Create and print worksheets without signing up or paying for a subscription.

Can I include an answer key?

Yes. Enable “Print Answer Key Page” in the worksheet settings to print a separate answer page. “Preview Answers” shows solutions on screen so you can check your work before printing.

Can I download a worksheet as a PDF?

Use “Print Worksheet,” then select “Save as PDF” in your browser’s print dialog where available. The generator uses your browser’s printing tools rather than a separate PDF download.

How do I change the difficulty or get new problems?

Adjust the number ranges and operation-specific options in the settings. Use Shuffle to generate a new set of facts while keeping your chosen settings.