Count & Represent Objects 1–10 — Answer Key
Part A: Fill in the Missing Number
Write the missing number on each line.
1. 1, 2, 3, 4, 5.
The missing number is 4. The sequence counts by ones: 1, 2, 3, 4, 5.
2. 5, 6, 7, 8, 9.
The missing number is 7. Between 6 and 8 is 7.
3. 7, 8, 9, 10.
The missing number is 7. The sequence starts at 7: 7, 8, 9, 10.
4. 2, 3, 4, 5, 6.
The missing number is 6. After 5 comes 6.
5. The number that comes right after 6 is 7.
7 comes right after 6. Numbers go in order: ...5, 6, 7, 8...
6. The number that comes right before 10 is 9.
9 comes right before 10. Numbers go in order: ...8, 9, 10.
7. 3, 4, 5, 6, 7.
The missing number is 4. Between 3 and 5 is 4.
8. 6, 7, 8, 9, 10.
The missing number is 9. Between 8 and 10 is 9.
9. The number between 4 and 6 is 5.
5 is between 4 and 6. The sequence is 4, 5, 6.
Part B: Matching
Match each group description to the correct number.
1. Draw a line to match.
A group of 3 cats
→ 3
5
A group of 7 stars
→ 7
9
A group of 5 apples
→ 5
3
A group of 9 hearts
→ 9
7
Match each group description to the number that tells how many. Count the objects in each group: cats→3, stars→7, apples→5, hearts→9.