Subtraction fact · plus 0, 1 and 2
12 − 10 = 2
Twelve minus ten is two. 10 and 12 are close together, so counting back 10 would be slow. Find the gap instead.
See 12 − 10
12 counters, 10 crossed out, 2 left.
Count up, not back
- Start at 10, the smaller number.
- Count up to 12: 11, 12.
- That's 2 hops, so 12 − 10 = 2.
Its fact family
2, 10 and 12 go together, so learning one of these helps with all of them. See the family.
Practice 12 − 10 in a game
A fact sticks when a child has to pull it from memory again and again. In this game 12 − 10 keeps coming back between the other facts in its family.
Every round leans on 12 − 10
Free to play · no signup · works on phones, tablets and computers
Quick quiz
12 − 10 FAQ
What is 12 − 10?
12 − 10 = 2. In words: twelve minus ten is two.
How can I check 12 − 10 = 2?
Add back: 2 + 10 = 12. If the addition gives the number you started with, the subtraction is right.
What grade learns 12 − 10?
This is a first and second grade fact. Common Core has children subtract within 20 in first grade (1.OA.C.6) and do it fluently with mental strategies in second grade (2.OA.B.2).
Is Sumtown really free?
Yes. The whole game plays free in your browser, with no signup, no ads and no time limit. All fourteen mini games are in it. An iPhone app is on its way, and you can read what it will add.
An app is on its way
We're building a Sumtown app for iPhone with the parts that need a real app: offline play for car rides, a town map that remembers how far your child got, and a parent report on every fact. Until then, the whole game is free right here.
Coming soon on theApp Store