Smallest one Digit Number |
1 – The smallest digit is 1. |

Greatest One Digit Number |
9 – The greatest digit is 9. |

Smallest Two Digit Number |
10 – The smallest digit is 1. We write a zero for each of the other places. So, the smallest 2 digit number is 10. |

Greatest Two Digit Number |
99 – The greatest digit is 9. We write nine for each of the other places. So, the greatest 2 digit number is 99. |

Smallest Three Digit Number |
100 – The smallest digit is 1. We write a zero for each of the other places. So, the smallest 3 digit number is 100. |

Greatest Three Digit Number |
999 – The greatest digit is 9. We write nine for each of the other places. So, the greatest 3 digit number is 999. |

Smallest Four Digit Number |
1000 – The smallest digit is 1. We write a zero for each of the other places. So, the smallest 4 digit number is 1000. |

Greatest Four Digit Number |
9999 – The greatest digit is 9. We write nine for each of the other places. So, the greatest 4 digit number is 9999. |

Smallest Five Digit Number |
10000 – The smallest digit is 1. We write a zero for each of the other places. So, the smallest 5 digit number is 10000. |

Greatest Five Digit Number |
99999 – The greatest digit is 9. We write nine for each of the other places. So, the greatest 5 digit number is 99999. |