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Basic Subtraction Lesson 3: Number 3

Here's an easy example:

5
-
3
=
2
 
          
-
      
=
    
 
   OliveDrab Box   Orchid Box   DarkViolet Box   SaddleBrown Box   MediumAquamarine Box  minus     OliveDrab Box   Orchid Box   DarkViolet Box  equals     SaddleBrown Box   MediumAquamarine 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
 
                  
-
      
=
            
 
   Tan Box   MediumTurquoise Box   Gold Box   SeaGreen Box   SandyBrown Box   DeepSkyBlue Box   GreenYellow Box   Empty Box   Coral Box  minus     Tan Box   MediumTurquoise Box   Gold Box  equals     SeaGreen Box   SandyBrown Box   DeepSkyBlue Box   GreenYellow Box   Empty Box   Coral 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
=
 
                    
-
      
=
              
 
   SlateBlue Box   MediumBlue Box   BurlyWood Box   Yellow Box   DarkGreen Box   ForestGreen Box   Chocolate Box   DarkOrchid Box   Wheat Box   Sienna Box  minus     SlateBlue Box   MediumBlue Box   BurlyWood Box  equals     Yellow Box   DarkGreen Box   ForestGreen Box   Chocolate Box   DarkOrchid Box   Wheat Box   Sienna 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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