Subtraction within 10 — Answer Key
Part A: Multiple Choice
Circle the correct answer for each question.
1. Which fact family goes with 9 - 6 = 3?
A) 9 - 3 = 6
B) 8 - 3 = 5
C) 10 - 6 = 4
D) 7 - 3 = 4
A is correct because 9 - 3 = 6 is the related fact in the same fact family as 9 - 6 = 3.
2. Jake has 7 toy cars. He loses some and has 2 left. How many did he lose?
A) 4
B) 3
C) 6
D) 5
D is correct because 7 - 2 = 5, so Jake lost 5 toy cars.
3. Which subtraction sentence equals 2?
A) 9 - 6
B) 10 - 8
C) 8 - 5
D) 7 - 4
B is correct because 10 - 8 = 2, while 9 - 6 = 3, 8 - 5 = 3, and 7 - 4 = 3.
4. If 7 - 2 = 5, then 7 - 5 = ___?
A) 3
B) 2
C) 4
D) 1
B is correct because 7 - 5 = 2. Since 7 - 2 = 5, the related fact is 7 - 5 = 2.
Part B: Fill in the Missing Number
Find the missing number. Write it on the line.
1. 10 - 3 = 7
Since ___ - 3 = 7, the missing number is 3 + 7 = 10.
2. 8 - 7 = 1
Since 8 - ___ = 1, the missing number is 8 - 1 = 7.
3. 9 - 5 = 4
Since ___ - 5 = 4, the missing number is 5 + 4 = 9.
4. 10 - 6 = 4
Since 10 - ___ = 4, the missing number is 10 - 4 = 6.
5. 8 - 2 = 6
Since ___ - 2 = 6, the missing number is 2 + 6 = 8.