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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   Blue Box   Yellow Box   DarkGoldenrod Box   Chartreuse Box   DarkBlue Box   DarkSeaGreen Box   Gold Box   Sienna Box   DarkCyan Box  minus     Blue Box   Yellow Box   DarkGoldenrod Box   Chartreuse Box   DarkBlue Box   DarkSeaGreen Box   Gold Box   Sienna Box  equals     DarkCyan 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
 
                            
-
                
=
            
 
   Empty Box   Fuchsia Box   MediumVioletRed Box   Goldenrod Box   Coral Box   Violet Box   YellowGreen Box   Purple Box   OliveDrab Box   DarkOrchid Box   Plum Box   GreenYellow Box   SpringGreen Box   DarkOrange Box  minus     Empty Box   Fuchsia Box   MediumVioletRed Box   Goldenrod Box   Coral Box   Violet Box   YellowGreen Box   Purple Box  equals     OliveDrab Box   DarkOrchid Box   Plum Box   GreenYellow Box   SpringGreen Box   DarkOrange 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
=
 
                                      
-
                
=
                      
 
   Plum Box   GreenYellow Box   SpringGreen Box   DarkOrange Box   PowderBlue Box   DodgerBlue Box   Pink Box   DarkSlateBlue Box   MediumSpringGreen Box   Navy Box   BlueViolet Box   MediumSlateBlue Box   Green Box   BurlyWood Box   Magenta Box   SaddleBrown Box   Brown Box   MediumPurple Box   LawnGreen Box  minus     Plum Box   GreenYellow Box   SpringGreen Box   DarkOrange Box   PowderBlue Box   DodgerBlue Box   Pink Box   DarkSlateBlue Box  equals     MediumSpringGreen Box   Navy Box   BlueViolet Box   MediumSlateBlue Box   Green Box   BurlyWood Box   Magenta Box   SaddleBrown Box   Brown Box   MediumPurple Box   LawnGreen 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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