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Basic Subtraction Lesson 3: Number 3

Here's an easy example:

5
-
3
=
2
 
          
-
      
=
    
 
   Purple Box   DarkGoldenrod Box   DarkBlue Box   CornflowerBlue Box   MediumVioletRed Box  minus     Purple Box   DarkGoldenrod Box   DarkBlue Box  equals     CornflowerBlue Box   MediumVioletRed Box

We start with five boxes, take away three boxes, and now have two boxes. We take away three boxes from our five boxes to get two boxes.


Here's another example:

9
-
3
=
6
 
                  
-
      
=
            
 
   SkyBlue Box   DarkOliveGreen Box   Chartreuse Box   Khaki Box   BlueViolet Box   Orchid Box   OliveDrab Box   DeepPink Box   DarkOrchid Box  minus     SkyBlue Box   DarkOliveGreen Box   Chartreuse Box  equals     Khaki Box   BlueViolet Box   Orchid Box   OliveDrab Box   DeepPink Box   DarkOrchid Box

We start with nine boxes, take away three boxes, and now have six boxes. We take away three boxes from our nine boxes to get six boxes.


Try this problem.

10
-
3
=
 
                    
-
      
=
              
 
   Chocolate Box   SaddleBrown Box   Navy Box   YellowGreen Box   Yellow Box   GreenYellow Box   MediumBlue Box   Violet Box   MediumSpringGreen Box   Plum Box  minus     Chocolate Box   SaddleBrown Box   Navy Box  equals     YellowGreen Box   Yellow Box   GreenYellow Box   MediumBlue Box   Violet Box   MediumSpringGreen Box   Plum Box

We start with ten boxes, take away three boxes, and now have seven boxes.


In order to do basic subtraction, 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:

  3 - 3 =   0
  4 - 3 =   1
  5 - 3 =   2
  6 - 3 =   3
  7 - 3 =   4
  8 - 3 =   5
  9 - 3 =   6
10 - 3 =   7
11 - 3 =   8
12 - 3 =   9
13 - 3 = 10
14 - 3 = 11
15 - 3 = 12


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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