Young Einstein Mathematics Educational Software Contents

Activity Number 279

Heading : Division

Description : Division with a 2 digit dividend, trade digits supplied, no remainders and using possible number sets.

Aim/Questions : Work out the division parts.

Educational software theory used:

Division is sharing a number into equal groups. However, sometimes you will not end up with even groups and there will be a remainder.

You will need to know your multiplication tables up to 10 to continue.

When we try and divide large numbers, we need a simple set of steps to work with, and repeat these steps several times.

Follow the examples as we go along.

Let’s look at this sum:  98 ÷ 7

Write the sum out in the following format.

       T   O

      .

 7)9 8

Work from left to right, one unit value at a time.

We first ask how many times will 7 go into 9? The answer is 1, so the ‘Tens’ units answer is 1

       T   O

   1  .

 7)9 8

Before we move to the ‘Ones’ units, let’s see what we have left over by multiplying our answer by 7 and subtracting it from the ‘Tens’ units.

1 x 7 = 7

       T   O

   1  .

 7)9 8

  -7

   2

Now let’s move to the next column and work on the ‘Ones’ units, and bring the 8 digit into action. However, since we had 2 ‘Tens’ units left over we really have 28 ‘Ones’ units and not 8.

       T   O

   1  .

 7)9 8

  -7

   2 8

We ask how many times will 7 go into 28? The answer is 4, so the ‘Ones’ units answer is 4

       T   O

   1 4 

 7)9 8

  -7

   2 8

To complete the sum, let’s see what we have left over by multiplying our answer by 7 and subtracting it from the ‘Ones’ units.

4 x 7 = 28

       T   O

   1 4

 7)9 8

  -7

   2 8

  -2 8

     0

We have zero left,  so our final answer is 14.

Educational software Instruction :

1.  Fill in the ‘Answer Boxes’ provided.

2.  The grey working boxes can be used to help you remember numbers. These are not part of the answer.

3.  Click the ‘OK’ button when you have finished.

You can change the number sets used to concentrate on specific patterns.

Module 279 These Instructions from 'Young Einstein Mathematics educational software by Maths Practice are Copyright. Copyright Maths Practice P/L 2003 ©