Addition Within 10 — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Jess has 5 grapes and gets 5 more. How many grapes does she have now?
A) 9
B) 8
C) 10
D) 7
Jess now has 10 grapes. Doubling 5 gives 5 + 5 = 10, which also makes a ten.
2. There are 7 ants on a leaf. Then 2 more crawl on. How many ants are there?
A) 10
B) 9
C) 8
D) 7
There are 9 ants on the leaf. 7 ants plus 2 more that crawl on make 7 + 2 = 9.
3. A box holds 3 crayons. Tom puts in 4 more. How many crayons are in the box?
A) 8
B) 6
C) 5
D) 7
The box holds 7 crayons. The 3 crayons already inside plus the 4 Tom adds make 3 + 4 = 7.
4. Lucy sees 6 fish. Then she sees 1 more. How many fish does Lucy see?
A) 8
B) 7
C) 6
D) 9
Lucy sees 7 fish in all. 6 + 1 = 7, so one more fish gives her 7.
Part B: Fill in the Blank
Write the correct answer on each line.
1. 8 + 2 = 10
8 plus 2 makes a ten, so 8 + 2 = 10.
2. 6 + 4 = 10
Since 6 + 4 = 10, the missing number is 6.
3. 3 + 6 = 9
Since 3 + 6 = 9, the missing number is 6.
4. Ben has 4 apples and finds 3 more. He has 7 apples now.
Ben joins his 4 apples with the 3 he found, so 4 + 3 = 7 apples now.
5. There are 1 big duck and 5 small ducks. There are 6 ducks.
1 big duck plus 5 small ducks gives 1 + 5 = 6 ducks together.