Relate Addition and Subtraction

Answer Key - Grade 1 Math Worksheet - Building Confidence

Write the answer on the line, or circle the answer.

1. 1.

   5 + ____ = 8. Which subtraction fact finds the missing number?

   • 7 - 5 = 2
   • 8 - 5 = 3
   • 9 - 5 = 4
2. 2.

   Use a related fact to solve 4 + 5 = 9.

3. 3.

   Which addition fact checks 10 - 7 = 3?

   • 10 + 7 = 17
   • 7 + 4 = 11
   • 7 + 3 = 10
4. 4.

   10 - 6 = 4. What missing number belongs in the blank?

5. 5.

   A whole is 7. One part is 2. What is the other part?

   5
6. 6.

   ____ + 3 = 8. Which subtraction fact finds the missing number?

   • 7 - 3 = 4
   • 8 - 4 = 4
   • 8 - 3 = 5
7. 7.

   6 + 3 = 9. So 9 - 6 = 3

8. 8.

   10 - 3 = 7. Check with addition: 3 + ____ = 10

   7
9. 9.

   Use addition to solve 8 - 2 = 6.

10. 10.

    There are 7 birds in all. 3 are in a tree. The rest are on the grass. How many are on the grass?

    4