Addition within 10 — Answer Key
Part A: Solve the Addition Problems
Add the numbers. Write the answer on the line.
1
+9
10
6
+2
8
3
+4
7
5
+3
8
7
+3
10
0
+6
6
8
+2
10
4
+5
9
2
+2
4
6
+4
10
1
+5
6
9
+1
10
Part B: Fill in the Missing Number
Write the missing number to complete each number sentence.
1. 3 + 5 = 8
3 + 5 = 8. The missing addend is 5.
2. 2 + 7 = 9
2 + 7 = 9. The missing addend is 2.
3. 6 + 0 = 6
6 + 0 = 6. Adding zero does not change the number.
4. 5 + 5 = 10
5 + 5 = 10. The missing addend is 5.
5. 8 + 2 = 10
8 + 2 = 10. The missing addend is 2.
6. 3 + 4 = 7
3 + 4 = 7. The missing addend is 3.