Monday, April 5, 2010

Multiplying Larger Numbers

This morning we jumped backwards to review multiplication. We learned how to multiply digits by 1 digits with regrouping. We didn't use the standard algorithm that you are probably accustomed to however. It relies heavily on children's knowledge of place value. That's why I like it! :o)

For example, when multiplying 16 x 8:

First, multiply 10 x 8. Write the product under the multiplication problem.

16
x 8
80

Next multiply 6 x 8. Write that product under the first product.

16
x 8

80
48

Add the two products together.

16
x 8

80
48
128

Sorry, I can't figure out how to do underline on this. Hope it's not too confusing... :o)

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