Counting in 100s | Year 4 Mathematics PDF Download

Using a Number Line to Count in 100s

Counting up and down in hundreds is similar to counting in tens. The primary change occurs in the hundreds digit, while the tens and ones remain constant.
Let's consider the following number line:

• You can observe that only the hundreds column changes with each step.
• Upon reaching 1000, you will start using the thousands column.
• It's important to remember that 1000 equals 10 hundreds.

Examples

Example 1: What is two-hundred less than 854?
Sol: Place value charts can also help you to count in hundreds. Here is 854 in a place value chart.
To find two hundred less, you take away two of the hundred counters in the hundreds column to find the answer.

Now you are left with 6 hundreds, 5 tens and 4 ones.
So the answer is 654.
As a subtraction, you would write this question:
854 – 200 = 654

Example 2: What is three-hundred more than 231?
Sol: Three hundred is the same as three lots of 100. Use the number line to help you count up in hundreds.

So three-hundred more than 231 is 531.
Counting up and down in hundreds is the same as adding or subtracting hundreds.
You could also write this question as:
231 + 300 = 531