Migrate celsius/fahrenheit conversions

snippets/celsiusToFahrenheit.md

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+---
+title: celsiusToFahrenheit
+tags: math,beginner
+---
+
+Converts Celsius to Fahrenheit.
+
+Follows the conversion formula `F =  1.8C + 32`.
+
+```js
+const celsiusToFahrenheit = degrees => 1.8 * degrees + 32;
+```
+
+```js
+celsiusToFahrenheit(33) // 91.4
+```

snippets/fahrenheitToCelsius.md

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+---
+title: fahrenheitToCelsius
+tags: math,beginner
+---
+
+Converts Fahrenheit to Celsius.
+
+Follows the conversion formula `C = (F - 32) * 5/9`.
+
+```js
+const fahrenheitToCelsius = degrees => (degrees - 32) * 5/9;
+```
+
+```js
+fahrenheitToCelsius(32); // 0
+```