restructuring to separate language from API

docs/blocks/math/math.md

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+# Math functions
+
+### @parent blocks/language
+
+The math library includes math related functions that you can use with [Numbers](/reference/types/number).
+
+### abs
+
+math `->` abs (x : [Number](/reference/types/number)) *returns* [Number](/reference/types/number)
+
+returns the absolute value of input parameter `x`
+
+![](/static/mb/blocks/math-0.png)
+
+### max
+
+math `->` max (x : [Number](/reference/types/number), y : [Number](/reference/types/number)) *returns* [Number](/reference/types/number)
+
+returns the larger of two input numbers (`x` and `y`)
+
+![](/static/mb/blocks/math-1.png)
+
+### min
+
+math `->` min (x : [Number](/reference/types/number), y : [Number](/reference/types/number)) *returns* [Number](/reference/types/number)
+
+returns the smaller of two input numbers (`x` and `y`)
+
+![](/static/mb/blocks/math-2.png)
+
+### random
+
+math `->` random (limit : [Number](/reference/types/number)) *returns* [Number](/reference/types/number)
+
+returns a random [Number](/reference/types/number) between 0 and the parameter *limit*
+
+![](/static/mb/blocks/math-3.png)
+
+### See also
+
+[Number](/reference/types/number)
+