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Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1
 
                        
-
                      
=
  
 
   DarkGreen Box   Brown Box   MediumOrchid Box   RosyBrown Box   SandyBrown Box   DarkSeaGreen Box   MediumSeaGreen Box   HotPink Box   DarkCyan Box   BurlyWood Box   Fuchsia Box   SeaGreen Box  minus     DarkGreen Box   Brown Box   MediumOrchid Box   RosyBrown Box   SandyBrown Box   DarkSeaGreen Box   MediumSeaGreen Box   HotPink Box   DarkCyan Box   BurlyWood Box   Fuchsia Box  equals     SeaGreen 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
 
                                
-
                      
=
          
 
   Chocolate Box   Chartreuse Box   Empty Box   SkyBlue Box   MediumSpringGreen Box   Peru Box   Plum Box   DarkOliveGreen Box   Tan Box   DeepSkyBlue Box   MediumBlue Box   DarkKhaki Box   GreenYellow Box   SlateBlue Box   Wheat Box   Aquamarine Box  minus     Chocolate Box   Chartreuse Box   Empty Box   SkyBlue Box   MediumSpringGreen Box   Peru Box   Plum Box   DarkOliveGreen Box   Tan Box   DeepSkyBlue Box   MediumBlue Box  equals     DarkKhaki Box   GreenYellow Box   SlateBlue Box   Wheat Box   Aquamarine 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
=
 
                                      
-
                      
=
                
 
   Violet Box   RoyalBlue Box   MediumAquamarine Box   DarkGoldenrod Box   DarkOrchid Box   CadetBlue Box   Aqua Box   PowderBlue Box   Cyan Box   DarkBlue Box   Pink Box   MediumSlateBlue Box   Olive Box   Yellow Box   Navy Box   CornflowerBlue Box   Purple Box   SteelBlue Box   Lavender Box  minus     Violet Box   RoyalBlue Box   MediumAquamarine Box   DarkGoldenrod Box   DarkOrchid Box   CadetBlue Box   Aqua Box   PowderBlue Box   Cyan Box   DarkBlue Box   Pink Box  equals     MediumSlateBlue Box   Olive Box   Yellow Box   Navy Box   CornflowerBlue Box   Purple Box   SteelBlue Box   Lavender 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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