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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   DarkOrange Box   Brown Box   Navy Box   SpringGreen Box   DodgerBlue Box   Sienna Box   MediumBlue Box   Aquamarine Box   DarkSeaGreen Box  minus     DarkOrange Box   Brown Box   Navy Box   SpringGreen Box   DodgerBlue Box   Sienna Box   MediumBlue Box   Aquamarine Box  equals     DarkSeaGreen 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
 
                            
-
                
=
            
 
   LimeGreen Box   MediumPurple Box   Purple Box   YellowGreen Box   Aqua Box   Goldenrod Box   Gold Box   CadetBlue Box   DarkCyan Box   RoyalBlue Box   GreenYellow Box   Chocolate Box   MediumTurquoise Box   Violet Box  minus     LimeGreen Box   MediumPurple Box   Purple Box   YellowGreen Box   Aqua Box   Goldenrod Box   Gold Box   CadetBlue Box  equals     DarkCyan Box   RoyalBlue Box   GreenYellow Box   Chocolate Box   MediumTurquoise Box   Violet 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
=
 
                                      
-
                
=
                      
 
   GreenYellow Box   Chocolate Box   MediumTurquoise Box   Violet Box   Fuchsia Box   DarkViolet Box   DarkOrchid Box   DarkGreen Box   SaddleBrown Box   Plum Box   Pink Box   DarkKhaki Box   Magenta Box   MediumSeaGreen Box   CornflowerBlue Box   BurlyWood Box   DarkOliveGreen Box   DarkMagenta Box   MidnightBlue Box  minus     GreenYellow Box   Chocolate Box   MediumTurquoise Box   Violet Box   Fuchsia Box   DarkViolet Box   DarkOrchid Box   DarkGreen Box  equals     SaddleBrown Box   Plum Box   Pink Box   DarkKhaki Box   Magenta Box   MediumSeaGreen Box   CornflowerBlue Box   BurlyWood Box   DarkOliveGreen Box   DarkMagenta Box   MidnightBlue 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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