Students usually enter fourth grade knowing their addition facts pretty well, but there are always a couple facts that need polishing up! Here are some strategies for the harder addition facts:
Making Tens Strategy
Students should notice if they can "make a ten" using the numbers.
9 + 5
*Think: I know 9 + 1 = 10
Add 5 more is 15.
Use the Doubles
Students should notice if there is a double that is close to the fact.
7 + 8
*Think: I know 7 + 7 = 14.
Add 1 more is 15.
7 + 8
*Think: I know 8 + 8 = 16.
Take away 1 is 15.