I Can Write Numbers to One Hundred Twenty Worksheet

Counting to 120 and writing each numeral is the first big step in first grade math, and the I Can Write Numbers to One Hundred Twenty Worksheet gives students a clear, uncluttered place to practice it. First graders are expected to count forward from any number up to 120 and to read and write the numerals they say out loud. Those two skills sound like one skill, but they are not: a child can chant the counting sequence perfectly and still hesitate over whether one hundred four is written 104 or 1004. Filling in a number chart puts the spoken sequence and the written numeral side by side, so the pattern of tens and ones becomes something students can see instead of something they have to remember.

This printable is a complete 120 chart with thirty numbers left out, two or three missing from every row. Students read across each row, say the counting sequence aloud, and write each missing number in its shaded box. Because the blanks are spread across all twelve rows and all ten columns, students cannot finish by copying one pattern; they have to track where they are in the count. Use this first grade counting worksheet as morning work, as a quick check after a counting lesson, or as a take-home review. The shaded boxes make it easy to see at a glance which numbers a student still needs, and the included answer key means grading takes a few seconds.

What’s Included

• 1 print-ready PDF worksheet
• Answer key
• A full 1–120 number chart with 30 missing numbers to write

There are three reasons the I Can Write Numbers to One Hundred Twenty Worksheet helps children learn this skill. First, the chart makes the base-ten pattern visible: every column shares a ones digit and every row shares a tens digit, so students start predicting the next numeral instead of guessing it. Second, writing the numbers rather than circling or matching them builds the numeral formation that timed assessments depend on, especially across the tricky decade changes at 29, 59 and 99. Third, the missing numbers are spread through the whole chart, so students who have mastered one to fifty still get real practice in the hundreds, where first graders most often stumble.

Teachers and parents can stretch this activity in a few easy ways. Read the chart aloud together and clap on every tens number to hear the pattern. Cover a row with a strip of paper and ask what comes next. Have students color every number they can count by tens, then by fives, and talk about which boxes got colored twice. At home, count steps to the mailbox or scoops in a measuring cup and find that number on the chart. Laminating a completed chart turns it into a reusable classroom reference for the rest of the year.

Related Resources

• I Can Count to 100 Worksheet
• Counting and Writing Numbers Worksheet
• Read Numbers 0 to 100 Worksheet
• Count to 120 Song by Have Fun Teaching