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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   DarkOrange Box   SteelBlue Box   MediumBlue Box   MediumSlateBlue Box   YellowGreen Box   DarkGoldenrod Box   RosyBrown Box   DarkBlue Box   Maroon Box   Yellow Box   MediumTurquoise Box   Gold Box  minus     DarkOrange Box   SteelBlue Box   MediumBlue Box   MediumSlateBlue Box   YellowGreen Box   DarkGoldenrod Box   RosyBrown Box   DarkBlue Box   Maroon Box   Yellow Box   MediumTurquoise Box  equals     Gold 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
 
                                
-
                      
=
          
 
   DarkMagenta Box   SkyBlue Box   Navy Box   Purple Box   LawnGreen Box   Orchid Box   RoyalBlue Box   Cyan Box   Pink Box   CadetBlue Box   DarkGreen Box   Fuchsia Box   SandyBrown Box   Magenta Box   CornflowerBlue Box   MediumOrchid Box  minus     DarkMagenta Box   SkyBlue Box   Navy Box   Purple Box   LawnGreen Box   Orchid Box   RoyalBlue Box   Cyan Box   Pink Box   CadetBlue Box   DarkGreen Box  equals     Fuchsia Box   SandyBrown Box   Magenta Box   CornflowerBlue Box   MediumOrchid 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
=
 
                                      
-
                      
=
                
 
   MidnightBlue Box   DarkOliveGreen Box   Chartreuse Box   DarkKhaki Box   SlateBlue Box   DodgerBlue Box   DarkSlateBlue Box   MediumPurple Box   BlueViolet Box   DarkViolet Box   Green Box   LimeGreen Box   ForestGreen Box   HotPink Box   Turquoise Box   DarkTurquoise Box   Lavender Box   DarkCyan Box   SaddleBrown Box  minus     MidnightBlue Box   DarkOliveGreen Box   Chartreuse Box   DarkKhaki Box   SlateBlue Box   DodgerBlue Box   DarkSlateBlue Box   MediumPurple Box   BlueViolet Box   DarkViolet Box   Green Box  equals     LimeGreen Box   ForestGreen Box   HotPink Box   Turquoise Box   DarkTurquoise Box   Lavender Box   DarkCyan Box   SaddleBrown 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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