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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   Fuchsia Box   Sienna Box   DarkOrange Box   MediumTurquoise Box   RoyalBlue Box   Thistle Box   MediumBlue Box   DarkSeaGreen Box   SlateBlue Box  minus     Fuchsia Box   Sienna Box   DarkOrange Box   MediumTurquoise Box   RoyalBlue Box   Thistle Box   MediumBlue Box   DarkSeaGreen Box  equals     SlateBlue 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
 
                            
-
                
=
            
 
   HotPink Box   DarkViolet Box   DarkMagenta Box   Chocolate Box   Gold Box   Purple Box   BlueViolet Box   Tan Box   DarkTurquoise Box   OliveDrab Box   Aqua Box   CornflowerBlue Box   Blue Box   Violet Box  minus     HotPink Box   DarkViolet Box   DarkMagenta Box   Chocolate Box   Gold Box   Purple Box   BlueViolet Box   Tan Box  equals     DarkTurquoise Box   OliveDrab Box   Aqua Box   CornflowerBlue Box   Blue 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
=
 
                                      
-
                
=
                      
 
   Aqua Box   CornflowerBlue Box   Blue Box   Violet Box   Yellow Box   MediumOrchid Box   MediumAquamarine Box   Coral Box   Green Box   Peru Box   Indigo Box   YellowGreen Box   MediumVioletRed Box   MediumSpringGreen Box   Teal Box   CadetBlue Box   ForestGreen Box   DarkSlateBlue Box   DarkOrchid Box  minus     Aqua Box   CornflowerBlue Box   Blue Box   Violet Box   Yellow Box   MediumOrchid Box   MediumAquamarine Box   Coral Box  equals     Green Box   Peru Box   Indigo Box   YellowGreen Box   MediumVioletRed Box   MediumSpringGreen Box   Teal Box   CadetBlue Box   ForestGreen Box   DarkSlateBlue Box   DarkOrchid 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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