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Basic Subtraction Lesson 8: Number 8

Here's an easy example:

9
-
8
=
1
 
                  
-
                
=
  
 
   MediumPurple Box   Chocolate Box   GreenYellow Box   Plum Box   MidnightBlue Box   BlueViolet Box   DarkSeaGreen Box   Empty Box   OliveDrab Box  minus     MediumPurple Box   Chocolate Box   GreenYellow Box   Plum Box   MidnightBlue Box   BlueViolet Box   DarkSeaGreen Box   Empty Box  equals     OliveDrab 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
 
                            
-
                
=
            
 
   Lavender Box   Aqua Box   MediumBlue Box   MediumSlateBlue Box   SkyBlue Box   Turquoise Box   Aquamarine Box   MediumOrchid Box   LawnGreen Box   Blue Box   Cyan Box   DarkOliveGreen Box   DarkOrchid Box   DeepSkyBlue Box  minus     Lavender Box   Aqua Box   MediumBlue Box   MediumSlateBlue Box   SkyBlue Box   Turquoise Box   Aquamarine Box   MediumOrchid Box  equals     LawnGreen Box   Blue Box   Cyan Box   DarkOliveGreen Box   DarkOrchid Box   DeepSkyBlue 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
=
 
                                      
-
                
=
                      
 
   Cyan Box   DarkOliveGreen Box   DarkOrchid Box   DeepSkyBlue Box   Orchid Box   LimeGreen Box   Fuchsia Box   MediumSpringGreen Box   SaddleBrown Box   DarkViolet Box   SeaGreen Box   Goldenrod Box   DarkGreen Box   DarkKhaki Box   Tan Box   Khaki Box   ForestGreen Box   DarkGoldenrod Box   RosyBrown Box  minus     Cyan Box   DarkOliveGreen Box   DarkOrchid Box   DeepSkyBlue Box   Orchid Box   LimeGreen Box   Fuchsia Box   MediumSpringGreen Box  equals     SaddleBrown Box   DarkViolet Box   SeaGreen Box   Goldenrod Box   DarkGreen Box   DarkKhaki Box   Tan Box   Khaki Box   ForestGreen Box   DarkGoldenrod Box   RosyBrown 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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