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Basic Addition Lesson 9: Number 9

Here's an easy example:

9
+
1
=
10
 
                  
+
  
=
                    
 
   OliveDrab Box   SandyBrown Box   DodgerBlue Box   Sienna Box   Coral Box   DeepSkyBlue Box   DarkKhaki Box   DarkSeaGreen Box   Magenta Box  plus     Orchid Box  equals     OliveDrab Box   SandyBrown Box   DodgerBlue Box   Sienna Box   Coral Box   DeepSkyBlue Box   DarkKhaki Box   DarkSeaGreen Box   Magenta Box   Orchid Box

We start with nine boxes, add one box, and now have ten boxes.


Here's another example:

9
+
2
=
11
 
                  
+
    
=
                      
 
   Chartreuse Box   HotPink Box   MediumSeaGreen Box   LimeGreen Box   DarkOliveGreen Box   Gold Box   RosyBrown Box   DarkCyan Box   ForestGreen Box  plus     DarkGreen Box   MediumAquamarine Box  equals     Chartreuse Box   HotPink Box   MediumSeaGreen Box   LimeGreen Box   DarkOliveGreen Box   Gold Box   RosyBrown Box   DarkCyan Box   ForestGreen Box   DarkGreen Box   MediumAquamarine Box

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


Try this problem.

9
+
3
=
 
                  
+
      
=
                        
 
   MediumAquamarine Box   DarkMagenta Box   MediumPurple Box   DarkOrange Box   CornflowerBlue Box   SpringGreen Box   YellowGreen Box   MediumOrchid Box   MediumTurquoise Box  plus     Purple Box   OliveDrab Box   SandyBrown Box  equals     MediumAquamarine Box   DarkMagenta Box   MediumPurple Box   DarkOrange Box   CornflowerBlue Box   SpringGreen Box   YellowGreen Box   MediumOrchid Box   MediumTurquoise Box   Purple Box   OliveDrab Box   SandyBrown Box

We start with nine boxes, add three boxes, and now have twelve 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:

9 + 1 = 10
9 + 2 = 11
9 + 3 = 12
9 + 4 = 13
9 + 5 = 14
9 + 6 = 15
9 + 7 = 16
9 + 8 = 17
9 + 9 = 18
9 + 10 = 19
9 + 11 = 20
9 + 12 = 21


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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