Subtraction within 10 — Answer Key
Part A: Fill in the Missing Number
Write the missing number to complete each number sentence.
1. 10 - 7 = 3
Since 10 - ___ = 3, the missing number is 10 - 3 = 7.
2. 10 - 6 = 4
Since ___ - 6 = 4, the missing number is 6 + 4 = 10.
3. 9 - 2 = 7
Since 9 - ___ = 7, the missing number is 9 - 7 = 2.
4. 9 - 1 = 8
Since ___ - 1 = 8, the missing number is 1 + 8 = 9.
5. 7 - 2 = 5
Since 7 - ___ = 5, the missing number is 7 - 5 = 2.
6. 7 - 3 = 4
Since ___ - 3 = 4, the missing number is 3 + 4 = 7.
7. 8 - 2 = 6
Since 8 - ___ = 6, the missing number is 8 - 6 = 2.
8. 10 - 5 = 5
Since ___ - 5 = 5, the missing number is 5 + 5 = 10.
9. 6 - 4 = 2
Since 6 - ___ = 2, the missing number is 6 - 2 = 4.
Part B: Match the Equation to Its Answer
Draw a line to match each subtraction problem to its answer.
1.
9 - 1
→ 8
4
10 - 5
→ 5
5
8 - 7
→ 1
8
7 - 3
→ 4
1
Match each subtraction to its difference: 9 - 1 = 8, 10 - 5 = 5, 8 - 7 = 1, 7 - 3 = 4.