Match Facts to 20
Build fluency with addition and subtraction facts within 20. Work out each fact, like 8 + 5 or 17 − 9, then match it to its answer. Tap a fact, then tap the number that is its answer, and watch the pair link. Aligned to Common Core 2.OA.B.2 — fluently adding and subtracting within 20 and knowing the sums of two one-digit numbers from memory.
Build fluency with addition and subtraction facts within 20. Work out each fact, like 8 + 5 or 17 − 9, then match it to its answer. Tap a fact, then tap the number that is its answer, and watch the pair link. Aligned to Common Core 2.OA.B.2 — fluently adding and subtracting within 20 and knowing the sums of two one-digit numbers from memory.
About this activity
Children work out cards like 8 + 5, 9 + 7, 14 − 6, and 17 − 8, then tap each fact and the number that is its answer to link the pair and build fluency within 20. It's a free, interactive Grade 2 math activity that runs right in the browser, with nothing to install and no account.
The big idea is quick, confident recall of addition and subtraction facts to 20. Each round mixes three facts — some plus, some minus — with their three answers jumbled in, so children compute each fact and then locate its matching value. Repeated practice across the rounds nudges facts like 9 + 9 = 18 and 16 − 9 = 7 from counting toward memory.
It is aligned to Common Core 2.OA.B.2 — fluently adding and subtracting within 20 and knowing all sums of two one-digit numbers from memory. No timer, no score — just calm, playful practice.
What's inside this activity
- Designed for Grade 2 learners (ages about 7–8)
- Common Core strand: Operations and Algebraic Thinking
- Aligned to Common Core standard 2.OA.B.2
How to play
Work out each fact card, such as 6 + 9 or 13 − 4.
Tap a fact, then tap the number that is its answer, and watch the pair link.
Match all three pairs in the round — there is no timer and no score, so take your time.
What your child practices
- Add and subtract within 20, with and without crossing ten
- Match a fact like 7 + 8 to its answer card
- Move addition and subtraction facts from counting toward memory
- Work fluently with both plus and minus facts in one set
Learning goals
Fluently add and subtract within 20 — the focus of Common Core 2.OA.B.2
Know the sums of one-digit numbers from memory
Build the fact recall that makes larger-number math easier
Frequently asked questions
- What does the Match Facts to 20 activity teach?
- Match Facts to 20 is a free interactive activity for Grade 2, focused on Operations and Algebraic Thinking. Children play it right in the browser — no printing, login, or setup required.
- Is Match Facts to 20 free to use?
- Yes. Match Facts to 20 is completely free, with no signup and no paywall, on any tablet, laptop, or classroom whiteboard.
- Which ages is this activity for?
- It is designed for Grade 2 (Operations and Algebraic Thinking) and works well for whole-class, small-group, or independent practice.