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If the two numbers are written as ab and cd then these represent the decimal numbers (10a + b) and (10c + d) and their product is 100*a*c + 10*a*d + 10*b*c + c*d = 100*a*c + 10*(a*d + b*c) + c*d. This is the result that you would get if you used partial products (also called chunking).
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Earn +20 ptsQ: How do you multiply a 2 digit number by a 2 digit number?
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How do you multiply a 2-digit number by a 2-digit number?
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What is a 3 digit number divisible by 2 and 9?
If you multiply 2*9, you get 18. Multiply that by 10 to get a three digit number, and you get 180.
How do you multiply a 3 digit number by a 2 digit number?
Here are two examples
Multiply one digit number by a two digit number?
2*10=20
How do you multiply a 4 digit number by a 2 digit number?
Using a calculator will make it easier
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