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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   Gold Box   Blue Box   DeepPink Box   SeaGreen Box   MediumTurquoise Box   MediumOrchid Box   CadetBlue Box   Coral Box   Teal Box   Chocolate Box   Turquoise Box   Aqua Box  minus     Gold Box   Blue Box   DeepPink Box   SeaGreen Box   MediumTurquoise Box   MediumOrchid Box   CadetBlue Box   Coral Box   Teal Box   Chocolate Box   Turquoise Box  equals     Aqua 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
 
                                
-
                      
=
          
 
   LimeGreen Box   OliveDrab Box   DarkCyan Box   Lavender Box   Magenta Box   LawnGreen Box   Fuchsia Box   Thistle Box   DarkOliveGreen Box   GreenYellow Box   DarkOrange Box   Chartreuse Box   Pink Box   MediumSeaGreen Box   Navy Box   Wheat Box  minus     LimeGreen Box   OliveDrab Box   DarkCyan Box   Lavender Box   Magenta Box   LawnGreen Box   Fuchsia Box   Thistle Box   DarkOliveGreen Box   GreenYellow Box   DarkOrange Box  equals     Chartreuse Box   Pink Box   MediumSeaGreen Box   Navy Box   Wheat 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
=
 
                                      
-
                      
=
                
 
   SkyBlue Box   ForestGreen Box   MediumSpringGreen Box   DarkGreen Box   RosyBrown Box   SlateBlue Box   Yellow Box   Violet Box   Khaki Box   DarkTurquoise Box   Indigo Box   MediumBlue Box   YellowGreen Box   MidnightBlue Box   SpringGreen Box   RoyalBlue Box   MediumPurple Box   DarkMagenta Box   MediumSlateBlue Box  minus     SkyBlue Box   ForestGreen Box   MediumSpringGreen Box   DarkGreen Box   RosyBrown Box   SlateBlue Box   Yellow Box   Violet Box   Khaki Box   DarkTurquoise Box   Indigo Box  equals     MediumBlue Box   YellowGreen Box   MidnightBlue Box   SpringGreen Box   RoyalBlue Box   MediumPurple Box   DarkMagenta Box   MediumSlateBlue 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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