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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   Maroon Box   Blue Box   SteelBlue Box   DarkSlateBlue Box   Sienna Box   ForestGreen Box   CadetBlue Box   MediumSeaGreen Box   MediumTurquoise Box  minus     Maroon Box   Blue Box   SteelBlue Box   DarkSlateBlue Box   Sienna Box   ForestGreen Box   CadetBlue Box   MediumSeaGreen Box  equals     MediumTurquoise 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
 
                            
-
                
=
            
 
   BlueViolet Box   YellowGreen Box   Orchid Box   MidnightBlue Box   Brown Box   DeepPink Box   LimeGreen Box   MediumPurple Box   Purple Box   LawnGreen Box   Goldenrod Box   Yellow Box   MediumBlue Box   RosyBrown Box  minus     BlueViolet Box   YellowGreen Box   Orchid Box   MidnightBlue Box   Brown Box   DeepPink Box   LimeGreen Box   MediumPurple Box  equals     Purple Box   LawnGreen Box   Goldenrod Box   Yellow Box   MediumBlue Box   RosyBrown 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
=
 
                                      
-
                
=
                      
 
   Goldenrod Box   Yellow Box   MediumBlue Box   RosyBrown Box   MediumSpringGreen Box   SkyBlue Box   Fuchsia Box   DarkMagenta Box   Indigo Box   MediumSlateBlue Box   Peru Box   DarkSeaGreen Box   DodgerBlue Box   RoyalBlue Box   DarkOliveGreen Box   DeepSkyBlue Box   SeaGreen Box   HotPink Box   DarkGreen Box  minus     Goldenrod Box   Yellow Box   MediumBlue Box   RosyBrown Box   MediumSpringGreen Box   SkyBlue Box   Fuchsia Box   DarkMagenta Box  equals     Indigo Box   MediumSlateBlue Box   Peru Box   DarkSeaGreen Box   DodgerBlue Box   RoyalBlue Box   DarkOliveGreen Box   DeepSkyBlue Box   SeaGreen Box   HotPink Box   DarkGreen 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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