Division

Division

(At the bottom of the page is a printable of Division help notes.)

In our Division Unit we will be learning about how to divide using the expanded algorith for division.  We will also be learning about divisibility rules.

 When we know how many groups there are and how many things are to be shared, but we don't know how many are in each group, we divide to share equally.

 Division is the inverse of multiplication. Inverse operations undo each other.  For example:  5 x 20 = 100 and 100 divided by 20 = 5.

 Division is a simpler way to do repeated subtraction.

 Divisibility Rules:

Number	Divisibility Rule
2	All even numbers or all numbers with 0, 2, 4, 6, or 8 in the ones place.
5	All whole numbers with 5 or 0 in the ones place.
10	All whole numbers with 0 in the ones place.
3	Any whole number whose digits add up to a multiple of 3. For example: 204 is divisible by 3 because 2 + 0 + 4 = 6 and 6 is a multiple of 3 because 2 x 3 = 6.

  Any number, except 0, is divisible by 1 and itself.  For example: 30 divided by 1 = 30 and 30 divided by 30 = 1.

 Division of 0 is a special case of divisibility because any number, except 0, will divide into 0.  Zero divided by any number, except 0, is zero. For example: 0 divided by 3 = 0.

 Division by 0 cannot be done. 

 When we divide we can use the expanded division algorithm.  Go to the Click Me button below for expanded algorithm power point to see how to use the division algorithm.

  Expanded Algorithm Power Point    

 To practice division facts.

  To practice division facts.  

 To practice completing division equations.

Multiplication and Division Notes (doc file)

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