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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   YellowGreen Box   BurlyWood Box   SandyBrown Box   DeepPink Box   DarkBlue Box   Coral Box   Peru Box   GreenYellow Box   CadetBlue Box  minus     YellowGreen Box   BurlyWood Box   SandyBrown Box   DeepPink Box   DarkBlue Box   Coral Box   Peru Box   GreenYellow Box  equals     CadetBlue 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
 
                            
-
                
=
            
 
   MediumTurquoise Box   MediumAquamarine Box   MediumVioletRed Box   Orchid Box   SteelBlue Box   Turquoise Box   HotPink Box   Green Box   DeepSkyBlue Box   Pink Box   PowderBlue Box   LimeGreen Box   MediumSlateBlue Box   Yellow Box  minus     MediumTurquoise Box   MediumAquamarine Box   MediumVioletRed Box   Orchid Box   SteelBlue Box   Turquoise Box   HotPink Box   Green Box  equals     DeepSkyBlue Box   Pink Box   PowderBlue Box   LimeGreen Box   MediumSlateBlue Box   Yellow 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
=
 
                                      
-
                
=
                      
 
   PowderBlue Box   LimeGreen Box   MediumSlateBlue Box   Yellow Box   Goldenrod Box   MediumPurple Box   Blue Box   DarkSlateBlue Box   Indigo Box   SpringGreen Box   BlueViolet Box   DodgerBlue Box   DarkKhaki Box   Empty Box   DarkSeaGreen Box   Wheat Box   RoyalBlue Box   DarkMagenta Box   Aquamarine Box  minus     PowderBlue Box   LimeGreen Box   MediumSlateBlue Box   Yellow Box   Goldenrod Box   MediumPurple Box   Blue Box   DarkSlateBlue Box  equals     Indigo Box   SpringGreen Box   BlueViolet Box   DodgerBlue Box   DarkKhaki Box   Empty Box   DarkSeaGreen Box   Wheat Box   RoyalBlue Box   DarkMagenta Box   Aquamarine 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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