Counting and Skip-Counting to 1,000

Count to 1,000

Counting past $100$ works the way counting to $100$ did. The ones go up to $9$, then the tens go up.

$$197,\ 198,\ 199,\ 200,\ 201$$

After $199$, the tens and ones roll back to $0$ and the hundreds go up by one: $200$. At the very end, $999$ is followed by $1{,}000$, one thousand.

Skip-count by 5s, 10s and 100s

To skip-count, add the same number each time.

• By $5$s: $5$, $10$, $15$, $20$, $25$, …
• By $10$s: $10$, $20$, $30$, $40$, …
• By $100$s: $100$, $200$, $300$, $400$, …

You can start anywhere. By $10$s from $240$: $250$, $260$, $270$. By $100$s from $130$: $230$, $330$, $430$. By $5$s from $85$: $90$, $95$, $100$, $105$.

Ten more and a hundred more

Adding $10$ adds one ten. So the tens digit goes up by one: $467 + 10 = 477$.

Adding $100$ adds one hundred. So the hundreds digit goes up by one: $467 + 100 = 567$.

Taking away works the same way, with the digit going down: $467 - 10 = 457$ and $467 - 100 = 367$.

Why only one digit changes

$467$ is $4$ hundreds, $6$ tens and $7$ ones. Adding $10$ puts one more ten with the tens. The hundreds and ones have nothing added, so they stay as they are.

The one time more changes is when the tens digit is $9$. Then one more ten makes ten tens, and ten tens is a new hundred. Ten more than $395$ is $405$: the tens roll back to $0$ and the hundreds go from $3$ to $4$.

Worked examples

Common mistakes

Practice problems