1st Grade Counting to 120 Lesson (Free PDF)
This numbers to 120 lesson for 1st Grade covers counting to 120 (Common Core 1.NBT.A.1), with a free PDF to print.
Counting to 120 means saying the numbers in order, starting at any number, and writing them with numerals. A number chart shows ten numbers in each row, so you can see what comes next. After 99 comes 100, and the counting continues through 101, 102, and on to 120.
Grade 1 · Common Core State Standards: 1.NBT.A.1
Key facts in this numbers to 120 lesson
- You can start counting at any number, not only at 1.
- Each row of a number chart has ten numbers; a row ends in 0.
- After 99 comes 100 (one hundred); 120 is one hundred twenty.
- Numbers in the same column of the chart end with the same digit.
- A tall rod shows ten cubes, so count rods first and singles after.
What does the number chart show?
A number chart lists the numbers in order. Each row has ten numbers. When you read a row from left to right, you are counting forward one at a time. The last box in a row ends in \(0\).
How do you count on from any number?
- Say the number where you start.
- Say the next number in the row. If you reach the end of a row, go to the first box of the next row.
- Stop at the number you need.
Example: Start at \(58\) and count to \(62\). Say \(58\), \(59\), \(60\), \(61\), \(62\). The row ends at \(60\), so \(61\) is the first box in the next row.
How do you read and write numbers past 99?
After \(99\) comes \(100\), which is read one hundred. Then the counting keeps going: \(101\) is one hundred one, and \(110\) is one hundred ten. The last number to know in Grade 1 is \(120\), one hundred twenty.
| Numeral | Word |
|---|---|
| \(45\) | forty-five |
| \(76\) | seventy-six |
| \(99\) | ninety-nine |
| \(100\) | one hundred |
| \(105\) | one hundred five |
| \(112\) | one hundred twelve |
| \(120\) | one hundred twenty |
How can you count a big group?
Group things in tens. A tall rod stands for ten cubes. Count the rods one ten at a time, then add the single cubes by counting on. Here, say \(10\), \(20\), \(30\), then \(31\), \(32\), \(33\), \(34\).
Look for patterns. All the numbers in one column of the chart end in the same digit: \(3\), \(13\), \(23\), \(33\), \(43\).
Numbers to 120 lesson: questions and answers
Can I start counting at a number other than 1?
Yes. Pick any starting number, such as 73, and say the numbers that come next: 74, 75, 76. The order never changes.
What number comes after 99?
The number after 99 is 100, read as one hundred. It is the first three-digit number. Then comes 101.
How do you write one hundred twelve?
Write 1 for the hundred, then the number 12 after it. That makes 112.
What pattern do you see in one column of the chart?
All numbers in one column end with the same digit. In the column with 5, you find 5, 15, 25, 35, and more.
What is the biggest number to count to in Grade 1?
First graders count to 120. The number 120 is read one hundred twenty. You can count on from any smaller number until you reach it.
How to use this numbers to 120 lesson
Read the definitions first, then follow the worked method line by line and redo the example on paper without looking. When every step makes sense, move on to the worksheet, then check yourself with the quiz.
Download the numbers to 120 lesson as a PDF with the button below and keep it with your notes.
All Grade 1 chapters: Grade 1 math.
