A.5 Listen and write the numbers up to 120
What does it mean to listen and write numbers?
Listening and writing numbers means hearing a number spoken out loud and writing the correct numeral to match what you hear.
- The teacher says, “forty-five.” You write 45.
- The teacher says, “one hundred.” You write 100.
Listen carefully to each part of the number before you write it.
Understanding numbers up to 120
Numbers up to 120 include one-digit, two-digit, and some three-digit numbers. These numbers are made using ones and tens.
- 7 is a one-digit number.
- 34 has 3 tens and 4 ones.
- 120 has 12 tens and 0 ones.
Knowing tens and ones helps you understand how big a number is.
Listening for tens and ones
When you hear a number, listen for the tens part and the ones part. This helps you write the number correctly.
- “Sixty-two” means 6 tens and 2 ones → 62.
- “Ninety” means 9 tens and 0 ones → 90.
Some numbers end with zero. These numbers have no ones.
Writing numbers that include one hundred
Numbers from 100 to 120 begin with one hundred and may include extra tens and ones.
- “One hundred three” → 103.
- “One hundred fifteen” → 115.
- “One hundred twenty” → 120.
After 100, keep counting forward using tens and ones.
Checking your work
After you write a number, check your work by saying the number out loud and matching it to what you heard.
- You hear “seventy-eight” and write 78. Say it back to check.
- You hear “one hundred ten” and write 110. Check the tens and ones.
Taking time to check helps you avoid small mistakes.
Common Core alignment: CCSS.MATH.CONTENT.1.NBT.B.1 – Count to 120, starting at any number less than 120, and read and write numerals.
Notes for teachers
This free lesson is aligned with CCSS.MATH.CONTENT.1.NBT.B.1. Use it for listening activities, number dictation, and independent practice.
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