Curated OER
Subtract One-Digits
In this finding the missing number activity, students read the greater number and the difference and supply the missing number. Students solve 7 problems.
Curated OER
Fact Families
In this fact family worksheet, 1st graders complete 4 sets of blanks that show addition and subtraction fact families. They examine 3 sets of numbers and determine which one shows the fact families that go with the numbers 5, 2, and 7.