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Basic Addition Lesson 9: Number 9

Here's an easy example:

9
+
1
=
10
 
                  
+
  
=
                    
 
   MediumTurquoise Box   SaddleBrown Box   Olive Box   Lavender Box   DeepPink Box   Turquoise Box   MediumVioletRed Box   SeaGreen Box   Violet Box  plus     Brown Box  equals     MediumTurquoise Box   SaddleBrown Box   Olive Box   Lavender Box   DeepPink Box   Turquoise Box   MediumVioletRed Box   SeaGreen Box   Violet Box   Brown Box

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


Here's another example:

9
+
2
=
11
 
                  
+
    
=
                      
 
   ForestGreen Box   CadetBlue Box   Empty Box   DarkSlateBlue Box   DarkGreen Box   MediumSeaGreen Box   RosyBrown Box   Maroon Box   SpringGreen Box  plus     GreenYellow Box   Aquamarine Box  equals     ForestGreen Box   CadetBlue Box   Empty Box   DarkSlateBlue Box   DarkGreen Box   MediumSeaGreen Box   RosyBrown Box   Maroon Box   SpringGreen Box   GreenYellow Box   Aquamarine Box

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


Try this problem.

9
+
3
=
 
                  
+
      
=
                        
 
   Aquamarine Box   MediumSpringGreen Box   Fuchsia Box   SlateBlue Box   Thistle Box   Blue Box   Tan Box   SkyBlue Box   Gold Box  plus     Orchid Box   MediumTurquoise Box   SaddleBrown Box  equals     Aquamarine Box   MediumSpringGreen Box   Fuchsia Box   SlateBlue Box   Thistle Box   Blue Box   Tan Box   SkyBlue Box   Gold Box   Orchid Box   MediumTurquoise Box   SaddleBrown 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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