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