Counting & Writing Numbers to 120 — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. What is 1 more than 109? 110
Adding 1 to 109 gives you 110 because 109 + 1 = 110.
2. What is 1 less than 70? 69
One less than 70 is 69 because 70 - 1 = 69.
3. Fill in: 85, 86, 87, 88
The missing number is 87 because when counting by ones, 86 + 1 = 87, and then 87 + 1 = 88.
4. Fill in: 103, 104, 105, 106
The missing number is 104 because 103 + 1 = 104, and then 104 + 1 = 105.
5. Count by tens: 40, 50, 60, 70
When counting by tens, you add 10 each time, so 60 + 10 = 70.
6. What is 10 more than 110? 120
Adding 10 to 110 gives you 120 because 110 + 10 = 120, which is the biggest number we count to.
7. Fill in: 117, 118, 119, 120
The missing number is 119 because counting by ones goes 117, 118, 119, 120.
8. What is 1 less than 101? 100
One less than 101 is 100 because 101 - 1 = 100.
9. Count by fives: 100, 105, 110, 115
When counting by fives, you add 5 each time, so 110 + 5 = 115.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Ten more than 90
→ 100
70
One less than 116
→ 115
110
The number after 69
→ 70
100
Ten less than 120
→ 110
115
90 + 10 = 100; 116 - 1 = 115; 69 + 1 = 70; and 120 - 10 = 110.