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Basic Addition Lesson 9: Number 9

Here's an easy example:

9
+
1
=
10
 
                  
+
  
=
                    
 
   DarkMagenta Box   Wheat Box   Empty Box   Maroon Box   CornflowerBlue Box   Navy Box   GreenYellow Box   BurlyWood Box   Chocolate Box  plus     DarkGoldenrod Box  equals     DarkMagenta Box   Wheat Box   Empty Box   Maroon Box   CornflowerBlue Box   Navy Box   GreenYellow Box   BurlyWood Box   Chocolate Box   DarkGoldenrod Box

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


Here's another example:

9
+
2
=
11
 
                  
+
    
=
                      
 
   LawnGreen Box   Coral Box   MediumSeaGreen Box   Plum Box   Lavender Box   DarkViolet Box   DarkSeaGreen Box   PowderBlue Box   Orchid Box  plus     DarkTurquoise Box   MediumBlue Box  equals     LawnGreen Box   Coral Box   MediumSeaGreen Box   Plum Box   Lavender Box   DarkViolet Box   DarkSeaGreen Box   PowderBlue Box   Orchid Box   DarkTurquoise Box   MediumBlue Box

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


Try this problem.

9
+
3
=
 
                  
+
      
=
                        
 
   MediumBlue Box   Cyan Box   MediumSlateBlue Box   HotPink Box   CadetBlue Box   SpringGreen Box   Sienna Box   DarkSlateBlue Box   DarkOrange Box  plus     DarkCyan Box   DarkMagenta Box   Wheat Box  equals     MediumBlue Box   Cyan Box   MediumSlateBlue Box   HotPink Box   CadetBlue Box   SpringGreen Box   Sienna Box   DarkSlateBlue Box   DarkOrange Box   DarkCyan Box   DarkMagenta Box   Wheat 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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