Count and Write Numbers to 20 Worksheet | Grade 1 Math

Updated: August 2026

Master counting skills with this Grade 1 worksheet. Students count various fun icons like stars and music notes to practice number sense and writing numbers up to 20.

Count and Write Numbers to 20 Worksheet | Grade 1 Math
Grade 1
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OVERVIEW

This comprehensive counting worksheet is specifically designed for first-grade students to strengthen their early numeracy skills. By working through various sets of engaging icons—ranging from music notes and hearts to stars and pentagons—students develop essential number sense, one-to-one correspondence, and subitizing abilities. This activity encourages children to carefully track their counting and accurately record the total numeric value, bridging the gap between physical objects and abstract numbers up to 20.

QUICK DETAILS

STEP-BY-STEP SOLVED EXAMPLES

Example 1: Counting Diamonds

Find the set of diamond shapes on the left side. First, count the top row: 1, 2, 3, 4, 5, 6, 7. Then, count the second row: 8, 9, 10, 11, 12, 13, 14. Finally, count the remaining four diamonds in the last row: 15, 16, 17, 18. Since there are 18 diamonds in total, write the number 18 in the provided box.

Example 2: Counting Cloud Icons

Locate the clouds on the right side of the page. Count the top row first: there are 7 clouds. Move to the second row and continue counting: 8, 9, 10, 11, 12. There are 12 clouds total. Practice writing the number 12 clearly in the box next to the group.

Example 3: Counting Music Notes

Look at the very first problem featuring double music notes. Count the first row of 7, then the second row of 7 (totaling 14), and then the final row of 5. By counting 15, 16, 17, 18, 19, we find the total is 19. Write the number 19 in the box.

TEACHER & PARENT TIPS

To maximize the learning benefits of this worksheet, encourage students to use a pencil to put a small mark or dot on each object as they count it; this physical action helps prevent double-counting or skipping items. If a child is struggling with numbers above 10, suggest they circle a group of ten first and then count the 'extras' to reinforce base-ten concepts. You can also turn this into a verbal game by asking, "Which box has the most objects?" or "Can you find two boxes that have the same number?" These extension questions build critical thinking and comparison skills essential for higher-level math.

Worksheet Preview

Count and Write Numbers to 20 Worksheet | Grade 1 Math Preview
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