Speed Maths Session 3 Dear Friends, THE SPEED MATHEMATICS METHOD Today we will learn double multiplication. We will take 92 x 94 as per our earlier session we multiply 92x94 92 x 94 We now look at each number and ask how many more do we need to make 100? We start with the 92. If we have 92, how many more do we need to make 100? The answer is 8. 92 plus 8 equals 100. We write 8 next to the 92. Our equation now looks like this: 92 - 08 x 94 We now go to 94. How many more to make 100? The answer is 6. We write 6 next to the 94. This is how the problem looks now: 92 - 08 x 94 - 06 We now take away, or subtract, crossways or diagonally. We either Subtract 6 from 92 or 8 from 94. It doesn’t matter which way we subtract— The answer will be the same, so choose the calculation that looks easier. 6 from 92 is 86, or 8 from 94 is 86. Either way the answer is 86. You only take away one time, since it is 100 base we multiply 86 with 100 so its 8600 Write 8600 below answer line. 92 - 08 x 94 - 06 ----------- 8600 For the last part of the answer you multiply, the numbers next to actual multiplication number. What is 8 times 6? Again you have trouble remembering this multiplication, follow the session 1 math Different of 8 to become 10 is 2 and 6 to become 10 is 4 so 92 - 08 -2 x 94 - 06 -4 ----------- 8600 So we have two parts in last part. First one is 8 - 4 or 6 - 2 is 4 and it will be the 10 base so it is 4 * 10 = 40 92 - 08 -2 x 94 - 06 -4 ----------- 8600 + 40 the second part is 4 x 2 is 8 so 92 - 08 -2 x 94 - 06 -4 ----------- 8600 + 40 + 8 = 8648 is the answer. I tried my best to explain this. If you still have any query, confusion or clarification. Kindly revert back to me. Have a nice day.
Posted on: Mon, 01 Jul 2013 03:57:34 +0000
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