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Teachers' Lounge Discussion: Multiplication tables

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From: Loyd

To: Teacher2Teacher Public Discussion
Date: 2005022610:50:15
Subject: Re: multiplication; nines and 7x8

Nines are easy since the digits add to 9. Study the pattern: 1x9= 09 (0+9=9) 2x9= 18 (1+8=9) 3x9= 27 (2+7=9) 4x9= 36 (3+6=9) 5x9= 45 (4+5=9) 6x9= 54 (5+4=9) 7x9= 63 (6+3=9) 8x9= 72 (7+2=9) 9x9= 81 (8+1=9) 7x8 is easy, since before you can get to the 7th and 8th grade you have to go through the 5th and 6th. Thus, 7x8=56

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