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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   MediumVioletRed Box   DarkCyan Box   Navy Box   Aqua Box   Goldenrod Box   DarkMagenta Box   DeepPink Box   MediumSpringGreen Box   DarkViolet Box   BurlyWood Box   DarkSlateBlue Box   SkyBlue Box  minus     MediumVioletRed Box   DarkCyan Box   Navy Box   Aqua Box   Goldenrod Box   DarkMagenta Box   DeepPink Box   MediumSpringGreen Box   DarkViolet Box   BurlyWood Box   DarkSlateBlue Box  equals     SkyBlue 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
 
                                
-
                      
=
          
 
   CornflowerBlue Box   DarkOliveGreen Box   Maroon Box   Orchid Box   YellowGreen Box   ForestGreen Box   DarkSeaGreen Box   DarkOrchid Box   MediumPurple Box   Fuchsia Box   SaddleBrown Box   Thistle Box   MediumSlateBlue Box   RoyalBlue Box   DarkOrange Box   DarkTurquoise Box  minus     CornflowerBlue Box   DarkOliveGreen Box   Maroon Box   Orchid Box   YellowGreen Box   ForestGreen Box   DarkSeaGreen Box   DarkOrchid Box   MediumPurple Box   Fuchsia Box   SaddleBrown Box  equals     Thistle Box   MediumSlateBlue Box   RoyalBlue Box   DarkOrange 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
=
 
                                      
-
                      
=
                
 
   Plum Box   BlueViolet Box   Pink Box   Peru Box   Yellow Box   LimeGreen Box   OliveDrab Box   Empty Box   Brown Box   Chartreuse Box   Wheat Box   Coral Box   DarkBlue Box   Teal Box   MediumBlue Box   MediumSeaGreen Box   Indigo Box   Olive Box   Tan Box  minus     Plum Box   BlueViolet Box   Pink Box   Peru Box   Yellow Box   LimeGreen Box   OliveDrab Box   Empty Box   Brown Box   Chartreuse Box   Wheat Box  equals     Coral Box   DarkBlue Box   Teal Box   MediumBlue Box   MediumSeaGreen Box   Indigo Box   Olive Box   Tan 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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