- twitter.com MathShortcut/status/380589094415257600@MathShortcut. · 19 сент. 2013 г. Profit and Loss >> http://math-shortcut-tricks.com/2013/08/profit-and-loss-shortcut-tricks.html …
- twitter.com MathShortcut/status/380589196693352448Math Shortcut Tricks. @MathShortcut. Simple Interest and Compound Interest >> http://math-shortcut-tricks.com/2013/08/simple-interest-and-compound-interest_5.html…