Addition within 10 — Answer Key
Part A: Multiple Choice
Circle the correct answer for each question.
1. Which two numbers add up to 9?
A) 3 and 5
B) 4 and 5
C) 2 and 6
D) 6 and 4
4 + 5 = 9. Three and five equals 8, not 9.
2. Which two numbers add up to 10?
A) 3 and 6
B) 5 and 4
C) 7 and 3
D) 2 and 5
7 + 3 = 10. This is a make-ten fact.
3. Which pair of numbers makes 7?
A) 4 and 3
B) 5 and 3
C) 2 and 4
D) 6 and 2
4 + 3 = 7.
4. Which two numbers add up to 8?
A) 3 and 4
B) 2 and 7
C) 5 and 3
D) 6 and 3
5 + 3 = 8.
Part B: Fill in the Missing Number
Write the missing number to complete each number sentence.
1. 3 + 6 = 9
3 + 6 = 9. The missing addend is 3.
2. 4 + 6 = 10
4 + 6 = 10. The missing addend is 6.
3. 2 + 8 = 10
2 + 8 = 10. The missing addend is 2.
4. 5 + 2 = 7
5 + 2 = 7. The missing addend is 2.
5. 7 + 3 = 10
7 + 3 = 10. The missing addend is 7.