Counting to 120 worksheets for 1st grade. Start with the 120 chart, then fill in a chart with the numbers missing, count on from any number (not just from 1), and count tens rods and ones to write numbers past 100. Every worksheet has its answer key on the second page.

The numbers from 1 to 120 in rows of ten, in large print, with the tens column shaded.
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The 120 chart with more than half of its numbers missing. Count and write them in. Includes answer key.
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Eight strips that start partway, such as 96 or 108, nine before-and-after sets, and two rows of missing numbers. Includes answer key.
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Six numbers drawn as tens rods and ones, four of them past 100. Write the tens, the ones and the number. Includes answer key.
Download PDFFirst graders count to 120, starting at any number, and read and write the numbers as they go. The stretch past 100 is the new part. Children who count to 100 easily often say "one hundred ten" straight after "one hundred nine" only with practice, and they often write 1001 for 101.
The 120 Chart is the reference: every number in rows of ten, so each number sits under the one that is ten less. Fill In the 120 Chart takes more than half of the numbers away. Numbers are missing in every row, including the row from 101 to 110.
Count On to 120 is counting from the middle. Each strip starts at a number such as 58, 96 or 108, and several cross a ten or cross 100. The before-and-after boxes ask for both directions.
Count Tens and Ones to 120 ties the count to place value: 11 tens and 5 ones is 115. For numbers to 100, see the hundreds chart. For tens and ones, see the place value worksheets, and for counting by 2s, 5s and 10s, the skip counting worksheets.