Missing Addends Within 20

Answer Key - Grade 1 Math Worksheet

Write the answer on the line.

1. 1.

   What number completes 7 + 3 = 10?
2. 2.

   8 is made from 3 and what number?

   5
3. 3.

   What number completes 4 + 14 = 18?
4. 4.

   What number completes 9 + 6 = 15?
5. 5.

   Fill the blank: 11 + 5 = 16.
6. 6.

   What number completes 1 + 17 = 18?
8. 7.

   What number completes 4 + 4 = 8?

9. 8.

   8 is made from 4 and what number?

   Use the picture in question 7.

   4
10. 9.

    Fill the blank: ____ + 14 = 16.

    2
11. 10.

    Fill the blank: 4 + 9 = 13.