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Basic Addition Lesson 11: Number 11

Here's an easy example:

11
+
1
=
12
 
                      
+
  
=
                        
 
   Sienna Box   SlateBlue Box   Magenta Box   CadetBlue Box   Fuchsia Box   SeaGreen Box   DarkOliveGreen Box   PowderBlue Box   RosyBrown Box   Yellow Box   ForestGreen Box  plus     Chartreuse Box  equals     Sienna Box   SlateBlue Box   Magenta Box   CadetBlue Box   Fuchsia Box   SeaGreen Box   DarkOliveGreen Box   PowderBlue Box   RosyBrown Box   Yellow Box   ForestGreen Box   Chartreuse Box

We start with eleven boxes, add one box, and now have twelve boxes.


Here's another example:

11
+
2
=
13
 
                      
+
    
=
                          
 
   MediumTurquoise Box   MediumSlateBlue Box   MediumPurple Box   Goldenrod Box   Indigo Box   Khaki Box   DarkGoldenrod Box   DarkSlateBlue Box   MediumBlue Box   SkyBlue Box   DarkMagenta Box  plus     Blue Box   LawnGreen Box  equals     MediumTurquoise Box   MediumSlateBlue Box   MediumPurple Box   Goldenrod Box   Indigo Box   Khaki Box   DarkGoldenrod Box   DarkSlateBlue Box   MediumBlue Box   SkyBlue Box   DarkMagenta Box   Blue Box   LawnGreen Box

We start with eleven boxes, add two boxes, and now have thirteen boxes.


Try this problem.

11
+
3
=
 
                      
+
      
=
                            
 
   MidnightBlue Box   SandyBrown Box   MediumVioletRed Box   DarkTurquoise Box   RoyalBlue Box   SteelBlue Box   DarkOrange Box   LimeGreen Box   Thistle Box   Aqua Box   Sienna Box  plus     SlateBlue Box   Magenta Box   CadetBlue Box  equals     MidnightBlue Box   SandyBrown Box   MediumVioletRed Box   DarkTurquoise Box   RoyalBlue Box   SteelBlue Box   DarkOrange Box   LimeGreen Box   Thistle Box   Aqua Box   Sienna Box   SlateBlue Box   Magenta Box   CadetBlue Box

We start with eleven boxes, add three boxes, and now have fourteen boxes.


In order to do basic addition, you must memorize some equations but fear not: FoxyMath will help you! When you are finished with this lesson, you will know the following equations:

11 + 1 = 12
11 + 2 = 13
11 + 3 = 14
11 + 4 = 15
11 + 5 = 16
11 + 6 = 17
11 + 7 = 18
11 + 8 = 18
11 + 9 = 10
11 + 10 = 21
11 + 11 = 22
11 + 12 = 23


The following exercise will help you learn the above equations and what they mean. Please take your time: take whatever time you need to learn the material.

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