Counting and Writing Numbers to 120 — Answer Key
Part A: Fill in the Missing Number
Write the missing number on each line.
1. 97, 98, 99, 100, 101.
Counting by 1s from 98 gives 99.
2. 99, 100, 101, 102, 103.
Counting by 1s from 101 gives 102.
3. 104, 105, 106, 107, 108.
Counting by 1s from 105 gives 106.
4. 109, 110, 111, 112, 113.
Counting by 1s from 109 gives 110.
5. 113, 114, 115, 116, 117.
Counting by 1s from 115 gives 116.
6. 117, 118, 119, 120.
Counting by 1s, the number before 118 is 117.
7. 78, 79, 80, 81, 82.
Counting by 1s from 79 gives 80.
8. 95, 96, 97, 98, 99.
Counting by 1s from 97 gives 98.
Part B: True or False?
Circle True or False for each statement.
1. The number after 99 is 100.
True False
True. When counting by 1s, 100 comes right after 99.
2. 110 comes after 111.
True False
False. 110 comes before 111, not after it.
3. 119 comes right before 120.
True False
True. When counting by 1s, 119 is the number right before 120.
4. The number before 100 is 101.
True False
False. The number before 100 is 99, not 101.
5. When you count, 105 comes right after 104.
True False
True. Counting by 1s, 105 comes right after 104.