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Basic Subtraction Lesson 3: Number 3

Here's an easy example:

5
-
3
=
2
 
          
-
      
=
    
 
   CadetBlue Box   HotPink Box   Sienna Box   Indigo Box   DarkOrange Box  minus     CadetBlue Box   HotPink Box   Sienna Box  equals     Indigo Box   DarkOrange 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
 
                  
-
      
=
            
 
   DarkSlateBlue Box   MediumTurquoise Box   MediumPurple Box   Aquamarine Box   DarkKhaki Box   SeaGreen Box   Goldenrod Box   BurlyWood Box   DarkSeaGreen Box  minus     DarkSlateBlue Box   MediumTurquoise Box   MediumPurple Box  equals     Aquamarine Box   DarkKhaki Box   SeaGreen Box   Goldenrod Box   BurlyWood Box   DarkSeaGreen 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
=
 
                    
-
      
=
              
 
   SpringGreen Box   Pink Box   DeepSkyBlue Box   Green Box   Yellow Box   MediumBlue Box   MediumAquamarine Box   Tan Box   RosyBrown Box   Olive Box  minus     SpringGreen Box   Pink Box   DeepSkyBlue Box  equals     Green Box   Yellow Box   MediumBlue Box   MediumAquamarine Box   Tan Box   RosyBrown Box   Olive 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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