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Basic Addition Lesson 11: Number 11

Here's an easy example:

11
+
1
=
12
 
                      
+
  
=
                        
 
   SkyBlue Box   BurlyWood Box   DarkGoldenrod Box   Turquoise Box   RosyBrown Box   Yellow Box   Olive Box   DarkCyan Box   DarkOliveGreen Box   GreenYellow Box   HotPink Box  plus     BlueViolet Box  equals     SkyBlue Box   BurlyWood Box   DarkGoldenrod Box   Turquoise Box   RosyBrown Box   Yellow Box   Olive Box   DarkCyan Box   DarkOliveGreen Box   GreenYellow Box   HotPink Box   BlueViolet Box

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


Here's another example:

11
+
2
=
13
 
                      
+
    
=
                          
 
   SaddleBrown Box   SteelBlue Box   Violet Box   DarkMagenta Box   SpringGreen Box   Cyan Box   Tan Box   MidnightBlue Box   MediumTurquoise Box   DodgerBlue Box   DeepPink Box  plus     OliveDrab Box   Magenta Box  equals     SaddleBrown Box   SteelBlue Box   Violet Box   DarkMagenta Box   SpringGreen Box   Cyan Box   Tan Box   MidnightBlue Box   MediumTurquoise Box   DodgerBlue Box   DeepPink Box   OliveDrab Box   Magenta Box

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


Try this problem.

11
+
3
=
 
                      
+
      
=
                            
 
   Teal Box   Maroon Box   Aqua Box   RoyalBlue Box   Aquamarine Box   CornflowerBlue Box   Fuchsia Box   Wheat Box   Blue Box   Plum Box   SkyBlue Box  plus     BurlyWood Box   DarkGoldenrod Box   Turquoise Box  equals     Teal Box   Maroon Box   Aqua Box   RoyalBlue Box   Aquamarine Box   CornflowerBlue Box   Fuchsia Box   Wheat Box   Blue Box   Plum Box   SkyBlue Box   BurlyWood Box   DarkGoldenrod Box   Turquoise 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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