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Basic Addition Lesson 11: Number 11

Here's an easy example:

11
+
1
=
12
 
                      
+
  
=
                        
 
   SlateBlue Box   YellowGreen Box   Sienna Box   DarkOrchid Box   Purple Box   Navy Box   Peru Box   DarkMagenta Box   Khaki Box   DarkViolet Box   Blue Box  plus     DarkSlateBlue Box  equals     SlateBlue Box   YellowGreen Box   Sienna Box   DarkOrchid Box   Purple Box   Navy Box   Peru Box   DarkMagenta Box   Khaki Box   DarkViolet Box   Blue Box   DarkSlateBlue Box

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


Here's another example:

11
+
2
=
13
 
                      
+
    
=
                          
 
   SpringGreen Box   DodgerBlue Box   Green Box   Thistle Box   MediumTurquoise Box   LimeGreen Box   Coral Box   Goldenrod Box   Olive Box   SaddleBrown Box   LawnGreen Box  plus     Plum Box   SeaGreen Box  equals     SpringGreen Box   DodgerBlue Box   Green Box   Thistle Box   MediumTurquoise Box   LimeGreen Box   Coral Box   Goldenrod Box   Olive Box   SaddleBrown Box   LawnGreen Box   Plum Box   SeaGreen Box

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


Try this problem.

11
+
3
=
 
                      
+
      
=
                            
 
   SteelBlue Box   Violet Box   Indigo Box   Pink Box   CornflowerBlue Box   DarkKhaki Box   DarkBlue Box   Lavender Box   SandyBrown Box   MediumOrchid Box   SlateBlue Box  plus     YellowGreen Box   Sienna Box   DarkOrchid Box  equals     SteelBlue Box   Violet Box   Indigo Box   Pink Box   CornflowerBlue Box   DarkKhaki Box   DarkBlue Box   Lavender Box   SandyBrown Box   MediumOrchid Box   SlateBlue Box   YellowGreen Box   Sienna Box   DarkOrchid 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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