Subtraction Within 10 — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Lily has 10 grapes. She eats 3 grapes. How many grapes are left?
A) 5
B) 6
C) 7
D) 8
10 - 3 = 7. After eating 3 of her 10 grapes, Lily still has 7 grapes on her plate.
2. There are 6 ducks in a pond. Then 4 ducks swim away. How many ducks stay in the pond?
A) 1
B) 2
C) 3
D) 4
6 - 4 = 2. When 4 of the 6 ducks swim off, only 2 ducks remain in the pond.
3. Jake has 8 toy cars. He loses 5 of them. How many toy cars does Jake have now?
A) 2
B) 3
C) 4
D) 5
8 - 5 = 3. Losing 5 toy cars from his 8 leaves Jake with 3 cars to play with.
4. A plate has 9 cookies. Mom takes 6 cookies. How many cookies are on the plate?
A) 2
B) 3
C) 4
D) 5
9 - 6 = 3. Taking 6 cookies from the plate of 9 leaves 3 cookies behind.
Part B: Fill in the Blank
Write the correct answer on each line.
1. 10 - 1 = 9
10 - 1 = 9. One less than ten is nine, the number right before 10.
2. 7 - 7 = 0
7 - 7 = 0. Taking a whole group away from itself leaves nothing, so the answer is 0.
3. 9 - 8 = 1
9 - 8 = 1. Nine and eight are next to each other on the number line, so they are only 1 apart.
4. 5 - 0 = 5
5 - 0 = 5. Subtracting zero does not take anything away, so the number stays the same.
5. 8 - 4 = 4
8 - 4 = 4. Eight splits into two equal groups of four, so 8 minus 4 leaves 4.