Count to 100 — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. One more than 42 is 43
One more means we add one, so forty-two plus one equals forty-three.
2. One less than 60 is 59
One less means we subtract one, so sixty minus one equals fifty-nine.
3. 31, 32, 33, 34
Counting in order, thirty-three comes right after thirty-two and before thirty-four.
4. One more than 78 is 79
Adding one to seventy-eight gives seventy-nine because counting up means plus one.
5. One less than 50 is 49
Fifty minus one equals forty-nine, the number that comes just before fifty.
6. 61, 62, 63, 64
When counting in order, sixty-four comes right after sixty-three by adding one.
7. One more than 99 is 100
One more than ninety-nine is one hundred, our top counting number in Kindergarten.
8. Missing in row: 71, 72, 73
On a 100-chart row, seventy-two sits between seventy-one and seventy-three in order.
9. One less than 40 is 39
Forty minus one equals thirty-nine, which is the number right before forty.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
One more than 24
→ 25
25
One less than 50
→ 49
49
One more than 70
→ 71
71
One less than 100
→ 99
99
Each card shows either one more or one less, so add or subtract one to match.