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Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1
 
                          
-
                        
=
  
 
   MediumTurquoise Box   Aquamarine Box   DarkMagenta Box   Cyan Box   Thistle Box   Violet Box   Navy Box   Goldenrod Box   Empty Box   DarkSeaGreen Box   Magenta Box   RosyBrown Box   MediumSeaGreen Box  minus     MediumTurquoise Box   Aquamarine Box   DarkMagenta Box   Cyan Box   Thistle Box   Violet Box   Navy Box   Goldenrod Box   Empty Box   DarkSeaGreen Box   Magenta Box   RosyBrown Box  equals     MediumSeaGreen Box

We start with thirteen boxes, take away twelve boxex, and now have eleven boxes. We take away one box from our twelve boxes to get one box.


Here's another example:

16
-
12
=
4
 
                                
-
                        
=
        
 
   Chocolate Box   Teal Box   BlueViolet Box   SkyBlue Box   Aqua Box   CadetBlue Box   Fuchsia Box   LawnGreen Box   DarkOliveGreen Box   Brown Box   MediumSlateBlue Box   DarkTurquoise Box   Indigo Box   DarkOrange Box   DeepSkyBlue Box   SeaGreen Box  minus     Chocolate Box   Teal Box   BlueViolet Box   SkyBlue Box   Aqua Box   CadetBlue Box   Fuchsia Box   LawnGreen Box   DarkOliveGreen Box   Brown Box   MediumSlateBlue Box   DarkTurquoise Box  equals     Indigo Box   DarkOrange Box   DeepSkyBlue Box   SeaGreen Box

We start with sixteen boxes, take away twelve boxes, and now have four boxes. We take away twelve boxes from our sixteen boxes to get four boxes.


Try this problem.

22
-
12
=
 
                                            
-
                        
=
                    
 
   Orchid Box   MediumAquamarine Box   Turquoise Box   HotPink Box   RoyalBlue Box   Purple Box   SteelBlue Box   Maroon Box   DarkViolet Box   SandyBrown Box   MidnightBlue Box   DodgerBlue Box   Khaki Box   SlateBlue Box   Pink Box   MediumOrchid Box   MediumPurple Box   DarkBlue Box   SaddleBrown Box   SaddleBrown Box   SaddleBrown Box   SaddleBrown Box  minus     Orchid Box   MediumAquamarine Box   Turquoise Box   HotPink Box   RoyalBlue Box   Purple Box   SteelBlue Box   Maroon Box   DarkViolet Box   SandyBrown Box   MidnightBlue Box   DodgerBlue Box  equals     Khaki Box   SlateBlue Box   Pink Box   MediumOrchid Box   MediumPurple Box   DarkBlue Box   SaddleBrown Box   SaddleBrown Box   SaddleBrown Box   SaddleBrown Box

We start with twenty-two boxes, take away twelve boxes, and now have ten 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:

12 - 12 =   0
13 - 12 =   1
14 - 12 =   2
15 - 12 =   3
16 - 12 =   4
17 - 12 =   5
18 - 12 =   6
19 - 12 =   7
20 - 12 =   8
21 - 12 =   9
22 - 12 = 10
23 - 12 = 11
24 - 12 = 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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