Multiply by Tens

You can multiply without regrouping if you take apart your numbers!

For example, 26 can be broken down into
20 + 6
Earlier this year we called that the expanded form.  It's much easier to multiply 20 x 40    and
6   x 40     and then add your products. 

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There is another way to imagine breaking apart your numbers.  Think of a rectangle that's 
40 x 26 feet. 

Split that rug into 2 pieces that are:

40 x 20 feet   and
40 x   6 feet

If you can find the area of each rug, you can add them together to find the total area.


What's the easiest way for you to multiply
40 x 26?

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