Posted by Kendra on Sunday, August 9, 2009 at 8:03pm.
give three ways a student could find the product of 9x7 if she had not memorized this fact.

Elementary Math for Educators  Ms. Sue, Sunday, August 9, 2009 at 8:08pm
Add nine 7's
Multiply 3 times 7. Multiply that answer by 3.
Multiply 10 times 7 and subtract 9.
Also  remember that the digits of any product of 9 and another number add up to 9 or a multiple of 9.
Examples: 18, 27, 36, etc.

Elementary Math for Educators  smart, Thursday, September 10, 2009 at 5:31pm
1. Add nine 7's
2. Multiply 3 times 7. Multiply that answer by 3.
3. Multiply 10 times 7 and subtract 9.
4. put your seven finger down and count on both sides and put the numbers together
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