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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   BlueViolet Box   Cyan Box   Violet Box   Magenta Box   Green Box   DarkGoldenrod Box   DarkMagenta Box   Gold Box   MediumSlateBlue Box  minus     BlueViolet Box   Cyan Box   Violet Box   Magenta Box   Green Box   DarkGoldenrod Box   DarkMagenta Box   Gold Box  equals     MediumSlateBlue Box

We start with nine boxes, take away eight boxes, and now have one box. We take away eight boxes from our nine boxes to get one box.


Here's another example:

14
-
8
=
6
 
                            
-
                
=
            
 
   DarkSlateBlue Box   Fuchsia Box   MediumTurquoise Box   DeepSkyBlue Box   LawnGreen Box   MediumPurple Box   YellowGreen Box   DarkSeaGreen Box   Purple Box   MediumBlue Box   Aquamarine Box   SaddleBrown Box   Goldenrod Box   DeepPink Box  minus     DarkSlateBlue Box   Fuchsia Box   MediumTurquoise Box   DeepSkyBlue Box   LawnGreen Box   MediumPurple Box   YellowGreen Box   DarkSeaGreen Box  equals     Purple Box   MediumBlue Box   Aquamarine Box   SaddleBrown Box   Goldenrod Box   DeepPink Box

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


Try this problem.

19
-
8
=
 
                                      
-
                
=
                      
 
   Aquamarine Box   SaddleBrown Box   Goldenrod Box   DeepPink Box   Brown Box   Thistle Box   SandyBrown Box   Indigo Box   DarkOrange Box   Turquoise Box   SkyBlue Box   DarkBlue Box   PowderBlue Box   Chocolate Box   Orchid Box   MediumVioletRed Box   SpringGreen Box   Olive Box   MediumSpringGreen Box  minus     Aquamarine Box   SaddleBrown Box   Goldenrod Box   DeepPink Box   Brown Box   Thistle Box   SandyBrown Box   Indigo Box  equals     DarkOrange Box   Turquoise Box   SkyBlue Box   DarkBlue Box   PowderBlue Box   Chocolate Box   Orchid Box   MediumVioletRed Box   SpringGreen Box   Olive Box   MediumSpringGreen Box

We start with nineteen boxes, take away eight boxes, and now have eleven 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:

  8 - 8 =   0
  9 - 8 =   1
10 - 8 =   2
11 - 8 =   3
12 - 8 =   4
13 - 8 =   5
14 - 8 =   6
15 - 8 =   7
16 - 8 =   8
17 - 8 =   9
18 - 8 = 10
19 - 8 = 11
20 - 8 = 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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