Subtraction Within 10 — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Leo had 10 grapes. He ate some and has 4 left. How many did Leo eat?
A) 5
B) 7
C) 6
D) 4
Leo started with 10 grapes and had 4 left, so 10 - 4 = 6 grapes were eaten. The part he ate plus the 4 left must equal 10.
2. There are 9 ducks in a pond. Some swim away and 3 stay. How many swam away?
A) 5
B) 7
C) 6
D) 4
Start with 9 ducks and 3 stay, so 9 - 3 = 6 ducks swam away. The ones that left and the ones that stayed together make the original 9.
3. If 8 - 2 = 6, what is 8 - 6?
A) 3
B) 4
C) 2
D) 1
Subtraction facts come in pairs from the same family. Since 8 - 2 = 6, the partners 2 and 6 swap roles, so 8 - 6 = 2.
4. Ava has 7 stickers. She uses 4 on her notebook. How many stickers are left?
A) 2
B) 4
C) 3
D) 5
Ava had 7 stickers and used 4, so 7 - 4 = 3 are left. Taking 4 away from 7 leaves 3 behind.
Part B: Fill in the Blank
Write the correct answer on each line.
1. 9 - 7 = 2
Think about what number loses 7 and ends up at 2. Since 2 + 7 = 9, the missing number is 9.
2. 10 - 7 = 3
Ten drops down to 3, so the part taken away is the gap between them. 10 - 7 = 3, so 7 fills the blank.
3. 5 - 4 = 1
The blank stands for a number that becomes 1 after losing 4. Counting up, 1 + 4 = 5, so 5 belongs in the blank.
4. 8 - 8 = 0
When a number minus itself equals 0, both numbers must match. 8 - 8 = 0, so 8 fills the blank.
5. 10 - 6 = 4
The starting number must be 6 more than 4. Since 4 + 6 = 10, the blank is 10.