# Dividing whole numbers by 10 and 100

## In a nutshell

Dividing one or two digit numbers by $10$ or $100$ involves moving place values once or twice to the right respectively. This can be done using a place value table or a decimal point.

## Dividing by 10

To divide a number by $10$, move the digits of the number one place value to the right.

##### Example 1

*Calculate $70 \div 10$.*

*Rewrite *$70$* in a place value table using zeros as placeholders. *

**TENS** | **ONES** | $.$ | **TENTHS** | **HUNDREDTHS** |

$7$ | $0$ | $.$ | $0$ | $0$ |

*When dividing by $10$, move the digits one place value to the right. *

**TENS** | **ONES** | $.$ | **TENTHS** | **HUNDREDTHS** |

| $7$ | $.$ | $0$ | $0$ |

$\underline{70\div 10 = 7.}$

**Note: **You do not have to draw a place value table but they are helpful to show the process of dividing by $10$ or $100$.

## Dividing by 100

To divide a number by $100$, move the digits of the number two place values to the right.

##### Example 2

*Calculate *$23 \div 100$*.*

*Rewrite *$23$* with a decimal point using zeros as a placeholder. *

$23 = 23.00$

*To divide by *$100$*, move the digits two place values to the right. This is the same as moving the decimal point two spaces to the left.*

$\overset{\curvearrowleft \curvearrowleft}{23}.00 \rightarrow 0.2300 = 0.23$

$\underline{23 \div 100 = 0.23.}$

**Note:** Zeros at the very end of a number, after the decimal point, are placeholders. They can be removed once you are done with the calculation.