Topics
1. Number and place value
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Australia
Year 3

1.03 Read and write 3 digit numbers

Lesson
Practice
Lesson

Are you ready?

Can you recognise, read, model and write numbers to 100?

Examples

Example 1

Write the amount shown with the blocks as a numeral.

This image shows a hundreds block and 4 ones blocks.
Worked Solution
Create a strategy

Complete a place value table when counting the blocks.

Apply the idea

There is 1 hundreds block, 0 tens blocks, and 4 ones blocks.

HundredsTensOnes
104

So the amount shown is 104.

Idea summary

We can use a place value table to write the values of the given blocks.

Read and write numbers up to 10 000

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Examples

Example 2

State the number one hundred and seventy two.

Worked Solution
Create a strategy

Think about how to use the numerals from 1 to 9 to fill out this place value table:

HundredsTensOnes (Units)
Apply the idea

"one hundred" means we have 1 hundred.

"seventy" means we have 7 tens.

"two" means we have 2 ones.

HundredsTensOnes (Units)
172

So the number is 172.

Example 3

What number is one hundred more than two hundred and ninety?

Worked Solution
Create a strategy

Write the number two hundred and ninety in the place value table:

HundredsTensOnes (Units)
Apply the idea

Two hundred and ninety is made up of 2 hundreds, 9 tens, and 0 ones.

Here is the complete table for two hundred and ninety:

HundredsTensOnes (Units)
290

To add one hundred we need to add a 1 in the hundreds place to become:

HundredsTensOnes (Units)
390

The number is 390.

Idea summary

  • Think about the place value table when writing out numbers.

  • Use 0 as a placeholder if a column is empty.

  • When reading or writing a number in words, use the word "and" when you see a 0 placeholder.

Outcomes

ACMNA052

Recognise, model, represent and order numbers to at least 10 000

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