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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   Peru Box   Plum Box   DeepSkyBlue Box   MediumTurquoise Box   DarkGreen Box   Coral Box   MediumBlue Box   SteelBlue Box   DarkTurquoise Box  minus     Peru Box   Plum Box   DeepSkyBlue Box   MediumTurquoise Box   DarkGreen Box   Coral Box   MediumBlue Box   SteelBlue Box  equals     DarkTurquoise 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
 
                            
-
                
=
            
 
   MidnightBlue Box   CadetBlue Box   GreenYellow Box   Orchid Box   DarkKhaki Box   LimeGreen Box   Thistle Box   Gold Box   Navy Box   Fuchsia Box   HotPink Box   MediumAquamarine Box   Green Box   SkyBlue Box  minus     MidnightBlue Box   CadetBlue Box   GreenYellow Box   Orchid Box   DarkKhaki Box   LimeGreen Box   Thistle Box   Gold Box  equals     Navy Box   Fuchsia Box   HotPink Box   MediumAquamarine Box   Green Box   SkyBlue 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
=
 
                                      
-
                
=
                      
 
   HotPink Box   MediumAquamarine Box   Green Box   SkyBlue Box   MediumOrchid Box   Chartreuse Box   Purple Box   Wheat Box   Indigo Box   Teal Box   RosyBrown Box   Khaki Box   Brown Box   SlateBlue Box   DarkBlue Box   Tan Box   DeepPink Box   Yellow Box   SandyBrown Box  minus     HotPink Box   MediumAquamarine Box   Green Box   SkyBlue Box   MediumOrchid Box   Chartreuse Box   Purple Box   Wheat Box  equals     Indigo Box   Teal Box   RosyBrown Box   Khaki Box   Brown Box   SlateBlue Box   DarkBlue Box   Tan Box   DeepPink Box   Yellow Box   SandyBrown 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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