Skill: Order numbers to 100

To order numbers from least to greatest, find the number with the smallest value first and the largest value last.

• A one-digit number is less than any two-digit number.
• For two-digit numbers, compare the tens first.
• If the tens are the same, compare the ones.

Example: Order $24,\ 7,\ 42,\ 29$ from least to greatest.

1. $7$ has only one digit, so it is less than all the two-digit numbers.
2. Compare $24,\ 42,\ 29$ by their tens:
   • $24$ has $2$ ten.
   • $42$ has $4$ tens.
   • $29$ has $2$ tens.
   Numbers with $2$ tens come before the number with $4$ tens.
3. Compare $24$ and $29$. They both have $2$ tens, so compare the ones:
   • $4$ ones is less than $9$ ones, so $24<29$.

The numbers from least to greatest are:

$$7,\ 24,\ 29,\ 42$$