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Addition and Subtraction Fact Family Generator

Three numbers, four related facts. Fact families are the clearest way to show a child that addition and subtraction undo each other. Choose a fact family house, a number triangle, or plain blanks.

  • Fact family house, number triangle, or plain layout
  • Give all three numbers, or only the two parts
  • Whole numbers up to 100
  • Answer key writes out all four facts

How to get the most from these worksheets

A few things worth knowing before you print a stack of them.

Why this beats more sums

A child who writes 8 + 5 = 13 and then has to produce 13 - 5 = 8 is being shown the inverse relationship directly. That single idea removes an enormous amount of later guesswork, and it is the foundation for solving equations.

Hide the whole to raise the difficulty

Setting the two parts only means a child must add before they can write any of the four facts, which turns a recall exercise into a two-step problem.

What makes this different

Genuinely unlimited

No monthly cap and no premium tier. Make fifty worksheets in an afternoon if you need to.

Nothing is uploaded

Questions, names and PDFs are all built in your browser. No worksheet content is ever sent to a server.

Several exercises per sheet

Combine arithmetic, tracing and a quiz on one page instead of printing three separate worksheets.

Edit every question

Retype any question, replace just one, or delete it — your edits survive when you change the settings.

Frequently asked questions

What is a fact family?

A set of three related numbers and the four number sentences they make. From 3, 5 and 8: 3 + 5 = 8, 5 + 3 = 8, 8 - 3 = 5 and 8 - 5 = 3.

What is the fact family house?

A house shape with the whole in the roof and the two parts in the rooms below. It is the presentation most primary schemes use.

Does the answer key show all four facts?

Yes, all four are printed on the key.

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