

Fill in Missing Numbers 1–20" is a set of printable worksheets that help KS1 learners (and advanced EYFS pupils) build fluency in number order and sequencing.
Each worksheet presents incomplete number sequences from 1 to 20, with learners required to identify and write the missing numbers in provided boxes.
This resource promotes number pattern recognition, logical thinking, and confidence in counting up to 20.
What’s Included:
- 2-page PDF with 15+ fill-in-the-blank number sequences
- Numbers range from 1 to 20
- Mixture of easy and challenging patterns
- Ideal for independent practice or guided learning
Perfect for:
- Early morning work
- Math centres and group work
- Homework assignments
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