Subtract multiples of 100's from three digit numbers
We've previously seen how to subtract multiples of 10 from a two digit numbers.
Subtracting multiples of 100 form a three digit number is a similar process, but this time we have to consider three place values; The hundreds, the tens, and the units.
To subtract multiples of 100 from a three digit number we can take the same two approaches. First we can take a step in the negative direction by 100, for every 100 in our multiple of 100.
So if we have the number 542 - 200, we'll need to take 2 steps of 100 in the negative direction.
542 - 100 = 442, then 442 - 100 = 342.
We can also line up our place values, hundreds, tens, and units and then subtract our ones, tens, and hundreds to find our answer.
| Hundreds | Tens | Units | |
|---|---|---|---|
| $$5 | $$4 | $$2 | |
| - | $$2 | $$0 | $$0 |
| = | $$3 | $$4 | $$2 |
Watch the following video to see how to do this.
Worked Examples
Example 1
$$600−100
Example 2
Complete the pattern by subtracting $$100 each time.
$$900, $$, $$, $$, $$, $$
Example 3
Find $$803−500