Performance Toolkit 2011

Performance Toolkit 2011 (Size: 28 MB)
SERIAL KEY:
Name: Team ROGUE
Serial: 9C7C-1118-9433-19A8-0BD0-D93C-C5A7-1D91-E4B5-E720

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How to multiply any two digits number by 11

How to multiply any two digits number by 11 Let’s say that you want to find the product of 36 and 11. One way to find it would be to multiply 36 by 10 and then add 36 on the result. There is, however, a simple trick that’ll do the job for any two digits number. To find out the result, write the first digit followed by the addition of the first and second digit, followed by the second digit. For example 36*11 now, 3(3+6)6=396 Example: What happens if the sum of the two numbers is bigger than 9? In this case you add 1 to the first number, followed by the last digit of the addition of the two numbers, and then again you add the second number For example 87*11 now, 8(8+7)7=957
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Multiplication tricks

Link to previous multiplication post 7. Squaring other 2-digit numbers Let’s say you want to square58. Square each digit and write a partial answer. 5×5 = 25. 8×8 = 64. Write down 2564 to start. Then, multiply the two digits of the number you’re squaring together, 5×8=40. Double this product: 40×2=80, then add a 0 to it, getting 800. Add 800 to 2564 to get 3364. This is pretty complicated so let’s do more examples. 32×32. The first part of the answer comes from squaring 3 and 2. 3×3=9. 2×2 = 4. Write down 0904. Notice the extra zeros.It’s important that every square in the partial product have two digits. Multiply the digits, 2 and 3, together and double the whole thing. 2×3x2 = 12. Add a zero to get 120. Add 120 to the partial product, 0904, and we get 1024. 56×56. The partial product comes from 5×5 and 6×6. Write down 2536. 5×6x2 = 60. Add a zero to get 600. 56×56 = 2536+600 = 3136. One more example: 67×67. Write down 3649 as the partial product. 6×7x2 = 42×2 = 84. Add...
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Quickly find percentages

Quickly find percentages *. To find out the 15% of a number, divide it by 10 andthe add half of it. *. To find out the 20% of a number, divide it by 10 andmultiply the result by two. *. To find out the 5% of a number, divide it by 10 andthe divide it by two.
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