Subtraction within 10 — Answer Key
Part A: Multiple Choice
Circle the correct answer for each question.
1. If 10 - 4 = 6, what is 10 - 6?
A) 3
B) 4
C) 5
D) 6
B is correct because 10 - 6 = 4. Since 10 - 4 = 6, the related fact is 10 - 6 = 4.
2. Maria had 9 stickers. She gave away some and has 5 left. How many did she give away?
A) 3
B) 5
C) 4
D) 2
C is correct because 9 - 5 = 4, so Maria gave away 4 stickers.
3. Which subtraction sentence equals 3?
A) 8 - 4
B) 10 - 7
C) 9 - 5
D) 7 - 5
B is correct because 10 - 7 = 3, while 8 - 4 = 4, 9 - 5 = 4, and 7 - 5 = 2.
4. If 8 - 3 = 5, then 8 - 5 = ___?
A) 2
B) 4
C) 3
D) 5
C is correct because 8 - 5 = 3. Since 8 - 3 = 5, the related fact is 8 - 5 = 3.
Part B: Fill in the Missing Number
Find the missing number. Write it on the line.
1. 7 - 4 = 3
Since ___ - 4 = 3, the missing number is 4 + 3 = 7.
2. 10 - 3 = 7
Since 10 - ___ = 7, the missing number is 10 - 7 = 3.
3. 9 - 9 = 0
Since 9 - ___ = 0, the missing number is 9 - 0 = 9.
4. 8 - 6 = 2
Since ___ - 6 = 2, the missing number is 6 + 2 = 8.
5. 10 - 5 = 5
Since 10 - ___ = 5, the missing number is 10 - 5 = 5.