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Horizontal Addition Worksheets — Grade 1

Horizontal addition writes each problem in a single line, like 8 + 5 = ___. These free Grade 1 worksheets build mental-maths skills, because children often add horizontal problems in their heads rather than in columns. Every sheet is generated fresh for unlimited practice.

SubjectMath
GradeGrade 1
SkillHorizontal Addition
FormatAuto-generated PDF + answer key

Create your Addition worksheet

Choose the options below and click 🔄 Regenerate for a brand-new set of problems — as many fresh worksheets as you like, no page reload. Then download the PDF or print it — with an answer key included.

Horizontal format is great for fact fluency and quick recall within 20. Mix it with vertical practice for well-rounded addition skills. Download the PDF, print, and use the answer key to check work fast.

Example horizontal addition problems

Here are a few sample problems like the ones this worksheet generates (with answers). Click Regenerate above for a brand-new set every time.

  1. 3 + 7 = 10
  2. 6 + 9 = 15
  3. 8 + 7 = 15
  4. 5 + 4 = 9
  5. 2 + 7 = 9
  6. 3 + 6 = 9
  7. 1 + 2 = 3
  8. 8 + 4 = 12
  9. 3 + 4 = 7
  10. 9 + 1 = 10

How to use these worksheets

  • Layout is set to Horizontal — click Regenerate for new problems.
  • Encourage mental strategies like making ten.
  • Increase digits as your child improves.
  • Download the PDF (with answer key) and print.

Frequently asked questions

What is horizontal addition?

Horizontal addition writes the problem across a line, such as 6 + 7 = ___, often solved with mental-maths strategies.

Which is better, horizontal or vertical?

Both help. Horizontal builds mental maths; vertical teaches column carrying. Using both is ideal.

Do I need an account?

No account and no cost — everything is free to generate and print.

More Grade 1 addition worksheets

All addition options Single-Digit 2-Digit Vertical No Regrouping Adding 3 Numbers Missing Addend 2-Digit, No Regrouping Adding Doubles Number Bonds

Related worksheet tags

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