Teacher2Teacher |
Q&A #494 |
From: Joan
To: Teacher2Teacher Public Discussion
Date: 2005022700:26:43
Subject: Re: multiplication
Hi, Here are the ways to master the tables Suppose you need 8 x 7 8 is 2 below 10 and 7 is 3 below 10. Think of it like this: 8 2 x 7 3 -------- 5 6 The answer is 56. Now I will explain how.... The units place if 56 ... that is 6 is obtained by multiplying the differences 2 and 3 The tens place of 56..... that is 5 is obtained by finding the difference diagonally....that is 8-3=5 or 7-2=5 !!!! This works with all tables past 5 in effect you will have to learn only the tables upto 5x5 to master all the multiplication in your schooling time. Try out more examples: 9x7=? Difference of 9 from 10 is 1 Difference of 7 from 10 is 3 So the units place is 3x1=3. And the tens place is the difference.... 9-3 = 6 or 7-1=6. Check out any of the numbers like this. JOAN
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