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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   MediumTurquoise Box   HotPink Box   MediumSeaGreen Box   Pink Box   MediumOrchid Box   Green Box   Purple Box   Indigo Box   BlueViolet Box   Orchid Box   Magenta Box   Brown Box  minus     MediumTurquoise Box   HotPink Box   MediumSeaGreen Box   Pink Box   MediumOrchid Box   Green Box   Purple Box   Indigo Box   BlueViolet Box   Orchid Box   Magenta Box  equals     Brown 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
 
                                
-
                      
=
          
 
   ForestGreen Box   DarkOliveGreen Box   DarkBlue Box   Tan Box   CornflowerBlue Box   SpringGreen Box   MediumAquamarine Box   Wheat Box   Fuchsia Box   Olive Box   Yellow Box   Turquoise Box   DeepPink Box   DeepSkyBlue Box   RoyalBlue Box   DarkTurquoise Box  minus     ForestGreen Box   DarkOliveGreen Box   DarkBlue Box   Tan Box   CornflowerBlue Box   SpringGreen Box   MediumAquamarine Box   Wheat Box   Fuchsia Box   Olive Box   Yellow Box  equals     Turquoise Box   DeepPink Box   DeepSkyBlue Box   RoyalBlue Box   DarkTurquoise 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
=
 
                                      
-
                      
=
                
 
   DarkGreen Box   Maroon Box   YellowGreen Box   Chartreuse Box   DodgerBlue Box   DarkOrchid Box   DarkCyan Box   OliveDrab Box   LawnGreen Box   MediumSpringGreen Box   Violet Box   MediumBlue Box   Aquamarine Box   DarkKhaki Box   DarkViolet Box   DarkSeaGreen Box   Cyan Box   RosyBrown Box   CadetBlue Box  minus     DarkGreen Box   Maroon Box   YellowGreen Box   Chartreuse Box   DodgerBlue Box   DarkOrchid Box   DarkCyan Box   OliveDrab Box   LawnGreen Box   MediumSpringGreen Box   Violet Box  equals     MediumBlue Box   Aquamarine Box   DarkKhaki Box   DarkViolet Box   DarkSeaGreen Box   Cyan Box   RosyBrown Box   CadetBlue 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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