Grade 2 · Unit 1: Number and place value
Hundreds, tens and ones
How do three digits make a number up to 999?
Big numbers around us
A bus route can be number 120. A school can have 450 learners. Numbers like these have three digits. Each digit has a job, depending on its place.
Hundreds, tens and ones
10 ones make 1 ten. 10 tens make 1 hundred. Here there are 2 hundreds, 4 tens and 6 ones. Together they make 246.
We say “two hundred and forty-six”.
Each digit has a place
This is place value. The 2 is in the hundreds place, so it is worth 200. We can write 246 = 200 + 40 + 6. This is the expanded form.
Zero holds a place
In 305 there are no tens. The 0 keeps the tens place empty, so the 3 stays in the hundreds place. Without the zero, 305 would become 35!
What I learnt
- I can read and write numbers to 999.
- I know the value of each digit.
- I can write numbers in expanded form.