Editing suggestions

source/05-roadmap.md

@@ -40,7 +40,7 @@ This chapter explains variables in Ruby.
 Ruby comes with lots of batteries included. Things that are built-in, and
 ready for you to be used when you open an empty Ruby file, or IRB.
 
-We'll look the two most basic, and most widely used ones:
+We'll look at the two most basic, most widely used ones:
 
 Numbers, and Strings (text). These will be good enough for us to introduce
 other concepts without spending too much time on talking about all the other

source/07-variables.md

@@ -41,7 +41,7 @@ number = 1
 puts number
 ```
 
-One important thing to note here is that a variable is not a "thing" an object
+One important thing to note here is that a variable is not a "thing" (an object)
 by itself. Instead it's just a *name* for an actual object. In our example the
 number `1` is an object, while `number` is a name for it because we've assigned
 it.
@@ -54,7 +54,7 @@ You can think of it like a post-it note with the name `number` written on it,
 and stuck on the actual thing, which is an object (in this case, a number).
 
 Imagine you were in the middle of learning some Spanish, and sticked post-its
-onto things in your apartment: the name *nevara* onto the refrigerator, *cama*
+onto things in your apartment: the name *nevera* onto the refrigerator, *cama*
 onto your bed, and *puerta del baño* onto the bathroom door.
 
 Now, whenever you use one of these terms, as in *abrir la nevera* (open the

source/08-built_in_classes/01-numbers.md

@@ -17,7 +17,7 @@ optional. This is the exact same number in Ruby: `1234.56`.
 
 <p class="hint">
 A number is defined by a series of digits, using a dot as a decimal mark, and
-optinally an underscore as a thousands separator.
+optionally an underscore as a thousands separator.
 </p>
 
 Note that different countries use different punctuation for decimal and
@@ -83,7 +83,7 @@ $ irb
 ```
 
 <p class="hint">
-Use floating point (decimal) numbers when doing devisions.
+Use floating point (decimal) numbers when doing divisions.
 </p>
 
 Exercises: How about doing some of the [exercises on numbers](/exercises/numbers.html)