ஸ்ரீ சாய்ராம் துணை WEB DESIGNER
J.ELANGOVAN..WEB DESIGNER

Friday, November 9, 2012

Daily one shortcut


                                              48*54

You've selected the correct notional base ie 50 but the actual base is 10. here r the steps
1) 48 -> -2 & 54 ->+4 (subtracting from base)
2) 52 // -8 (either 48 + 4 or 54 - 2 // -2 x +8)
3) since 50(notional base is 5 times actual base of 10, multiply 52 by 5 260 // -8
4) multiply left hand side by 10 (base) and add it to the right hand side
2600 + (-8) = 2592

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