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September 23, 2014

September 23, 2014

Posted by **Kendra** on Sunday, August 9, 2009 at 8:03pm.

- Elementary Math for Educators -
**Ms. Sue**, Sunday, August 9, 2009 at 8:08pmAdd 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 5:31pm1. 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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