Some research suggests that the subtraction facts should be delayed until children know at least three quarters of the addition facts. This is likely due to students using Think Addition as a major strategy in learning subtraction.
This suggests that the fact family approach to basic facts should be used after addition strategies are rehearsed. However, subtraction is actually a more complex topic than addition, but we frequently spend a lot less time on it.
Fact Family Cards
While these contain addition and subtraction, they’re placed in part of the website due to the reasons mentioned above.