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Basic Subtraction Lesson 3: Number 3

Here's an easy example:

5
-
3
=
2
 
          
-
      
=
    
 
   Yellow Box   DarkGreen Box   MediumBlue Box   BurlyWood Box   CornflowerBlue Box  minus     Yellow Box   DarkGreen Box   MediumBlue Box  equals     BurlyWood Box   CornflowerBlue 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
 
                  
-
      
=
            
 
   DarkKhaki Box   Aquamarine Box   Violet Box   Goldenrod Box   MidnightBlue Box   Thistle Box   Turquoise Box   DeepPink Box   Chocolate Box  minus     DarkKhaki Box   Aquamarine Box   Violet Box  equals     Goldenrod Box   MidnightBlue Box   Thistle Box   Turquoise Box   DeepPink Box   Chocolate 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
=
 
                    
-
      
=
              
 
   MediumPurple Box   DarkTurquoise Box   Olive Box   PowderBlue Box   Brown Box   Sienna Box   DarkSeaGreen Box   MediumSlateBlue Box   Fuchsia Box   LawnGreen Box  minus     MediumPurple Box   DarkTurquoise Box   Olive Box  equals     PowderBlue Box   Brown Box   Sienna Box   DarkSeaGreen Box   MediumSlateBlue Box   Fuchsia Box   LawnGreen 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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