Number Writing 0-20 — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Sam had 3 stickers. He got 2 more. How many in all?
A) 5
B) 4
C) 6
D) 3
Three plus two equals five, so Sam has five stickers when we add two new ones.
2. Find the missing number: 4, 5, ___, 7, 8.
A) 3
B) 6
C) 9
D) 5
The sequence counts up by one, so after five we say six, then seven, making six the missing number.
3. Find the missing number: 10, 11, 12, ___, 14.
A) 9
B) 12
C) 13
D) 15
The sequence adds one each time, so after twelve comes thirteen, then fourteen, making thirteen missing.
4. Mia had 6 cubes. She lost 2. How many are left?
A) 8
B) 5
C) 3
D) 4
Six minus two equals four, so Mia has four cubes left after losing two of them.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Find the missing number: 1, 2, 3, 4, 5.
The sequence adds one each time, so after two we say three, then four, making three missing.
2. Find the missing number: 7, 8, 9, 10.
The sequence adds one each time, so after nine comes ten, making ten the missing number.
3. Tom had 4 toys. Mom gave 3 more. He has 7 toys.
Four plus three equals seven, so Tom has seven toys when we add three new ones.
4. Lia had 9 dolls. She gave 4 away. She has 5 left.
Nine minus four equals five, so Lia has five dolls left after giving four away.
5. Find the missing number: 15, 16, 17, 18.
The sequence adds one each time, so after sixteen comes seventeen, then eighteen, making seventeen missing.