Sign in to save your progress, vote, and build your own decks.Sign in
Subtraction strategies: doubles
When you are subtracting half a number think of doubles
Where this fits
6-3
3
18-9
9
10-5
5
12-6
6
14-7
7
2-1
1
4-2
2
8-4
4
When you are subtracting half a number think of doubles