Vedic Maths - Tutorial 4 <http://vedicmaths.110mb.com/tutorial4.html>
A quick way to square numbers that end in 5 - *752 = 5625 * 752 means 75 x 75. The answer is in two parts: 56 and 25. The last part is always *25*. The first part is the first number, 7, multiplied by the number "one more", which is 8: so 7 x 8 = *56 * - Similarly *852 = 7225* because 8 x 9 = 72. ------------------------------ Method for multiplying numbers where the first figures are the same and the last figures add up to 10. - *32 x 38 = 1216* Both numbers here start with 3 and the last figures (2 and 8) add up to 10. So we just multiply 3 by 4 (the next number up) to get *12* for the first part of the answer. And we multiply the last figures: 2 x 8 = *16* to get the last part of the answer. Diagrammatically: - And *81 x 89 = 7209* We put 09 since we need two figures as in all the other examples http://vedicmaths.110mb.com/tutorial4.html --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "AJAX_Tools" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/ajax_tools?hl=en -~----------~----~----~----~------~----~------~--~---
