Counting and Writing Numbers to 120 — Answer Key
Part A: Multiple Choice
Circle the correct answer for each question.
1. Which number is 10 more than 105?
A) 106
B) 110
C) 115
D) 104
Adding 10 to 105 gives 115.
2. Which sequence has an error?
A) 88, 89, 90, 91
B) 99, 100, 101, 102
C) 110, 111, 113, 114
D) 117, 118, 119, 120
The sequence 110, 111, 113, 114 has an error because it skips 112.
3. If you start at 96 and count forward 5, where do you land?
A) 100
B) 101
C) 102
D) 99
Starting at 96 and counting forward 5 gives 97, 98, 99, 100, 101, so you land on 101.
4. What number comes right before 110?
A) 100
B) 111
C) 109
D) 108
When counting by 1s, the number right before 110 is 109.
Part B: Fill in the Missing Number
Write the missing number on each line.
1. Count: 109, 110, 111, 112, 113.
Counting by 1s from 111 gives 112.
2. 3 more than 97 is 100.
97 + 3 = 100.
3. Count: 74, 75, 76, 77, 78.
Counting by 1s from 74 gives 75.
4. 10 more than 110 is 120.
Adding 10 to 110 gives 120.
5. Count backward: 112, 111, 110, 109, 108.
Counting backward by 1s from 111 gives 110.