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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   DarkBlue Box   Indigo Box   DarkGreen Box   MediumAquamarine Box   Wheat Box   Thistle Box   Gold Box   Coral Box   HotPink Box   DarkOrange Box   Pink Box   DarkViolet Box  minus     DarkBlue Box   Indigo Box   DarkGreen Box   MediumAquamarine Box   Wheat Box   Thistle Box   Gold Box   Coral Box   HotPink Box   DarkOrange Box   Pink Box  equals     DarkViolet 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
 
                                
-
                      
=
          
 
   Turquoise Box   DarkSlateBlue Box   Violet Box   Plum Box   YellowGreen Box   Purple Box   Empty Box   DarkCyan Box   Chartreuse Box   SeaGreen Box   Magenta Box   Brown Box   Blue Box   PowderBlue Box   LawnGreen Box   MediumBlue Box  minus     Turquoise Box   DarkSlateBlue Box   Violet Box   Plum Box   YellowGreen Box   Purple Box   Empty Box   DarkCyan Box   Chartreuse Box   SeaGreen Box   Magenta Box  equals     Brown Box   Blue Box   PowderBlue Box   LawnGreen Box   MediumBlue 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
=
 
                                      
-
                      
=
                
 
   Aqua Box   DarkTurquoise Box   Goldenrod Box   CadetBlue Box   Navy Box   SpringGreen Box   MediumSpringGreen Box   Khaki Box   MediumTurquoise Box   DarkOliveGreen Box   Teal Box   DarkOrchid Box   RoyalBlue Box   MediumPurple Box   MidnightBlue Box   Green Box   Aquamarine Box   Olive Box   DeepSkyBlue Box  minus     Aqua Box   DarkTurquoise Box   Goldenrod Box   CadetBlue Box   Navy Box   SpringGreen Box   MediumSpringGreen Box   Khaki Box   MediumTurquoise Box   DarkOliveGreen Box   Teal Box  equals     DarkOrchid Box   RoyalBlue Box   MediumPurple Box   MidnightBlue Box   Green Box   Aquamarine Box   Olive Box   DeepSkyBlue 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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