add question floating-point

questions/floating-point.md

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+### What does `0.1 + 0.2 === 0.3` return?
+
+#### Answer
+
+It equals to `false` because JavaScript uses the IEEE 754 standard for Math and it makes use of 64-bit floating numbers. This causes precision errors when doing decimal calculations, in short, due to computers working in Base 2 while decimal is Base 10
+
+```js
+0.1 + 0.2; // 0.300000004
+```
+
+#### Aditional links
+
+* [Fix "0.1 + 0.2 = 0.300000004" in JavaScript](http://blog.blakesimpson.co.uk/read/61-fix-0-1-0-2-0-300000004-in-javascript)
+
+#### Good to hear
+
+* A simple solution to this problem
+
+<!-- tags: (javascript) -->