10 free missing number worksheets
Free missing number worksheets with answer keys. Practice finding missing numbers in sequences from 1-100 — printable PDFs for preschool to grade 2.
Missing number activities are a simple but powerful way to build number sense. When a student sees 4, 5, __, 7, 8 and fills in 6, they're not just counting — they're understanding number order, recognizing patterns, and developing the mental number line that all future math depends on. These worksheets progress from filling in missing numbers in sequences of 1-10 up through patterns within 100.
What Students Will Practice
- Finding missing numbers in sequences from 1-10 (e.g., 1, 2, __, 4, 5)
- Finding missing numbers in sequences from 1-20 and 1-100
- Counting forward and backward to fill in gaps (e.g., 15, __, 13, 12 — counting backward)
- Completing number charts (like a hundred chart) with specific numbers removed
- Skip counting sequences with missing values (e.g., 5, 10, __, 20, 25 — counting by 5s)
- Recognizing the pattern in a sequence and applying it to find the missing number
Missing number activities support counting and number sense standards for preschool through 2nd grade. They build the sequential understanding of numbers that students need for addition, subtraction, and place value.
Missing number worksheet 10
Missing number worksheet 10
Missing number worksheet 9
Missing number worksheet 9
Missing number worksheet 8
Missing number worksheet 8
Missing number worksheet 7
Missing number worksheet 7
Missing number worksheet 6
Missing number worksheet 6
Missing number worksheet 5
Missing number worksheet 5
Missing number worksheet 4
Missing number worksheet 4
Missing number worksheet 3
Missing number worksheet 3
Missing number worksheet 2
Missing number worksheet 2
Missing number worksheet 1
Missing number worksheet 1
How to Use These Worksheets
Start with what your child already knows and build outward.
- Begin with sequences in the 1-10 range where only one number is missing. Once your child can fill in a single gap reliably, move to sequences with two missing numbers, then to the 1-20 range, and eventually to the full 1-100 chart.
- Encourage your child to count aloud while pointing to each number and the blank. "3, 4... [blank]... 6, 7" — saying the sequence out loud helps them hear the missing number. The auditory pattern reinforces the visual one.
- Use the hundred chart worksheets as a reference tool AND a practice activity. A completed hundred chart on the wall lets children self-check. A partially blank hundred chart challenges them to fill in specific numbers using their knowledge of rows (tens) and columns (ones).
- For skip counting sequences, make sure your child understands the pattern before trying to fill in blanks. Ask: "What are we counting by? 2s? 5s? 10s?" Once they identify the pattern, the missing number is straightforward. If they can't identify the pattern, practice that skill first before doing the worksheet.
Common Mistakes to Watch For
- Counting from 1 every time: A child who needs to find the number after 14 might count 1, 2, 3... all the way to 15 instead of just going 14, 15. While counting from 1 works, it's slow and shows the child doesn't yet have a strong feel for where numbers sit in the sequence. Practice counting on from any starting number.
- Confusing the direction: In backward counting sequences (20, 19, __, 17), students sometimes write 21 instead of 18 because they default to counting forward. Make sure they notice whether the numbers are getting bigger or smaller before filling in the blank.
- Errors in the teens: The numbers 11-19 are tricky because their names don't follow the standard pattern (we say "thirteen" not "threeteen" and "fifteen" not "fiveteen"). Students often make more errors in this range. Extra practice with 10-20 sequences helps.
- Skipping numbers when skip counting: In a count-by-2 sequence (2, 4, __, 8), students might write 5 (counting by 1) instead of 6 (counting by 2). Confirm they understand the skip counting pattern before attempting the worksheet.
Frequently Asked Questions
What age should my child start missing number worksheets?
Children who can count to 10 reliably (usually around age 3.5-4) can start simple missing number activities in the 1-10 range. By kindergarten (age 5-6), most students work with numbers to 20 or 30. By 1st-2nd grade, they should handle sequences within 100 and skip counting patterns.
Why does my child struggle with missing numbers even though they can count?
Reciting numbers in order (rote counting) and understanding number position in a sequence are different skills. Your child might know "1, 2, 3, 4, 5" as a memorized string but not grasp that 3 sits between 2 and 4. Missing number activities specifically build this positional understanding, which takes practice beyond memorized counting.
How do hundred charts help with missing numbers?
Hundred charts organize numbers in rows of 10, making patterns visible. Moving right adds 1. Moving down adds 10. This visual structure helps children predict what number belongs in any position — even if they can't count to that number from 1. It's one of the most useful math tools for early learners.
Should my child use a number line or chart for help?
Yes, initially. These are reference tools, not cheating. Over time, gradually reduce reliance: first let them check after writing their answer, then encourage them to try without looking. The goal is building an internal mental number line, and external tools are the stepping stone to get there.
After mastering missing numbers in sequences, students are ready for more complex pattern work — growing patterns, number relationships, and eventually the addition and subtraction fact fluency that builds directly on strong number sense.
