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Basic Subtraction Lesson 3: Number 3

Here's an easy example:

5
-
3
=
2
 
          
-
      
=
    
 
   Cyan Box   CadetBlue Box   Turquoise Box   SeaGreen Box   Indigo Box  minus     Cyan Box   CadetBlue Box   Turquoise Box  equals     SeaGreen Box   Indigo 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
 
                  
-
      
=
            
 
   DarkTurquoise Box   RoyalBlue Box   MediumSpringGreen Box   MediumSlateBlue Box   Orchid Box   DarkCyan Box   DarkOliveGreen Box   MediumOrchid Box   MidnightBlue Box  minus     DarkTurquoise Box   RoyalBlue Box   MediumSpringGreen Box  equals     MediumSlateBlue Box   Orchid Box   DarkCyan Box   DarkOliveGreen Box   MediumOrchid Box   MidnightBlue 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
=
 
                    
-
      
=
              
 
   YellowGreen Box   DarkSeaGreen Box   Goldenrod Box   Maroon Box   MediumVioletRed Box   DeepPink Box   Tan Box   Navy Box   HotPink Box   Blue Box  minus     YellowGreen Box   DarkSeaGreen Box   Goldenrod Box  equals     Maroon Box   MediumVioletRed Box   DeepPink Box   Tan Box   Navy Box   HotPink Box   Blue 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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