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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   Brown Box   SlateBlue Box   Tan Box   Chocolate Box   Purple Box   DeepSkyBlue Box   Magenta Box   Fuchsia Box   Goldenrod Box   SeaGreen Box   SteelBlue Box   Aquamarine Box  minus     Brown Box   SlateBlue Box   Tan Box   Chocolate Box   Purple Box   DeepSkyBlue Box   Magenta Box   Fuchsia Box   Goldenrod Box   SeaGreen Box   SteelBlue Box  equals     Aquamarine Box

We start with twelve boxes, take away eleven boxes, and now have one box. We take away eleven boxes from our twelve boxes to get one box.


Here's another example:

16
-
11
=
5
 
                                
-
                      
=
          
 
   BlueViolet Box   DarkOrchid Box   Gold Box   SkyBlue Box   Green Box   MediumSpringGreen Box   Khaki Box   Navy Box   OliveDrab Box   Violet Box   YellowGreen Box   MidnightBlue Box   Peru Box   BurlyWood Box   DarkTurquoise Box   Thistle Box  minus     BlueViolet Box   DarkOrchid Box   Gold Box   SkyBlue Box   Green Box   MediumSpringGreen Box   Khaki Box   Navy Box   OliveDrab Box   Violet Box   YellowGreen Box  equals     MidnightBlue Box   Peru Box   BurlyWood Box   DarkTurquoise Box   Thistle Box

We start with sixteen boxes, take away eleven boxes, and now have five boxes. We take away eleven boxes from our sixteen boxes to get five boxes.


Try this problem.

19
-
11
=
 
                                      
-
                      
=
                
 
   SaddleBrown Box   DarkGreen Box   MediumPurple Box   DarkSeaGreen Box   DarkOrange Box   Orchid Box   ForestGreen Box   Coral Box   MediumTurquoise Box   Cyan Box   Wheat Box   MediumSlateBlue Box   Maroon Box   DarkSlateBlue Box   Pink Box   CornflowerBlue Box   DarkOliveGreen Box   MediumAquamarine Box   DarkViolet Box  minus     SaddleBrown Box   DarkGreen Box   MediumPurple Box   DarkSeaGreen Box   DarkOrange Box   Orchid Box   ForestGreen Box   Coral Box   MediumTurquoise Box   Cyan Box   Wheat Box  equals     MediumSlateBlue Box   Maroon Box   DarkSlateBlue Box   Pink Box   CornflowerBlue Box   DarkOliveGreen Box   MediumAquamarine Box   DarkViolet Box

We start with nineteen boxes, take away eleven boxes, and now have eight 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:

11 - 11 =   0
12 - 11 =   1
13 - 11 =   2
14 - 11 =   3
15 - 11 =   4
16 - 11 =   5
17 - 11 =   6
18 - 11 =   7
19 - 11 =   8
20 - 11 =   9
21 - 11 = 10
22 - 11 = 11
23 - 11 = 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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