Missing number worksheets 1 20 help young learners practice counting in order while noticing which number comes next. These worksheets usually ask children to complete short number sequences from 1 to 20, with one or more numbers left out. They are a simple way to build number recognition, early sequencing, and rote counting skills without adding extra math steps.
What the pages include
The most common format is a fill-in-the-blank row, such as 1, 2, __, 4, 5, where the missing number must be written in the space. Some pages use a number chart, asking children to spot the empty square in a 1 to 20 grid. Others use a simple number line with one gap to complete. These layouts keep the task clear and focused, which is helpful for early learners who are still learning to recognize numerals quickly.
How to use them well
A simple way to use these worksheets is to begin with small gaps, such as one missing number in an otherwise complete sequence. Once that feels easy, move to larger gaps or mixed sequences, like missing numbers near the middle of the row. You can also switch between straight counting rows and charts so children see the same numbers in different formats. This keeps practice familiar without making it too repetitive.
These worksheets mainly support counting order, number recognition, and early sequencing practice. They also help children say the numbers aloud as they work, which reinforces rote counting from 1 to 20. Because the range stays small, the task remains manageable and confidence-building. For best results, choose pages with clear printing, simple layouts, and only a few items per page. That makes it easier for young learners to focus on the missing number and complete the sequence correctly.
