Doubles and Doubles Subtraction
A great way to start learning facts is to learn your doubles -
1+1 = 2 2+2 = 4
3+3 = 6 4+4 = 8
5+5 = 10
Once you're confident with doubles, are you speedy with your doubles subtraction facts?
10 - 5 = 5 8 - 4 = 4
6 - 3 = 3 4 - 2 = 2
2 - 1 = 1
Doubles +1
Once you master doubles facts, mastering doubles +1 is the next logical step. If you know 5+5 = 10, then you can figure out 5+6 and 6+5 both equal 11. If you know 3+3=6, then you can figure out that 3+4 or 4+3 are a doubles +1 fact and equal 7.
Counting On 0,1,2,3 & Counting Back 0,1,2,3
Counting on and counting back is a common strategy that students like to use. However, we do not encourage counting on or back with numbers past 3. Kids make errors in counting and it is inefficient to count on/back with larger numbers.
Make a 10
Learning all the possible combinations of 10 is a powerful strategy. It helps your child regroup when adding larger numbers and understand our place value system as a whole.
1+9 = 10 9+1=10
2+8=10 8+2=10
3+7=10 7+3=10
4+6=10 6+4=10
5+5=10
Once you have those addition facts down, can you do all the make a 10 subtraction problems?
10 - 1 = 9 10-2=8
10-3=7 10-4=6
10-5=5
