Monday, April 30, 2012

Maths: standard written multiplication

Yesterday we used the grid method of multiplying.  We could see where each number came from.  The grid method is shown on the left side of the board above.  On the right side, the same multiplication has been done using a standard written method.  I have used a colour code to help show that the numbers on the right are the same ones that appear on the left.
560 on the right comes from 80 x 7
63 comes from 9 x 7


Here are two more examples.  Next to the numbers you can see explanations of where they came from.  The last step is to add the two numbers to get the final answer, which is shown in green.

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.