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Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1
 
                          
-
                        
=
  
 
   LawnGreen Box   ForestGreen Box   PowderBlue Box   SpringGreen Box   MidnightBlue Box   DeepSkyBlue Box   DarkGoldenrod Box   SaddleBrown Box   DeepPink Box   DarkSeaGreen Box   CornflowerBlue Box   SlateBlue Box   Brown Box  minus     LawnGreen Box   ForestGreen Box   PowderBlue Box   SpringGreen Box   MidnightBlue Box   DeepSkyBlue Box   DarkGoldenrod Box   SaddleBrown Box   DeepPink Box   DarkSeaGreen Box   CornflowerBlue Box   SlateBlue Box  equals     Brown 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
 
                                
-
                        
=
        
 
   Indigo Box   MediumOrchid Box   Orchid Box   SeaGreen Box   Blue Box   BlueViolet Box   SteelBlue Box   Thistle Box   DarkMagenta Box   Wheat Box   DarkOliveGreen Box   MediumSpringGreen Box   RoyalBlue Box   Coral Box   Sienna Box   DodgerBlue Box  minus     Indigo Box   MediumOrchid Box   Orchid Box   SeaGreen Box   Blue Box   BlueViolet Box   SteelBlue Box   Thistle Box   DarkMagenta Box   Wheat Box   DarkOliveGreen Box   MediumSpringGreen Box  equals     RoyalBlue Box   Coral Box   Sienna Box   DodgerBlue 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
=
 
                                            
-
                        
=
                    
 
   DarkCyan Box   Turquoise Box   Magenta Box   MediumAquamarine Box   Goldenrod Box   Empty Box   SandyBrown Box   YellowGreen Box   SkyBlue Box   Olive Box   MediumPurple Box   GreenYellow Box   Peru Box   HotPink Box   DarkBlue Box   RosyBrown Box   Fuchsia Box   Violet Box   OliveDrab Box   OliveDrab Box   OliveDrab Box   OliveDrab Box  minus     DarkCyan Box   Turquoise Box   Magenta Box   MediumAquamarine Box   Goldenrod Box   Empty Box   SandyBrown Box   YellowGreen Box   SkyBlue Box   Olive Box   MediumPurple Box   GreenYellow Box  equals     Peru Box   HotPink Box   DarkBlue Box   RosyBrown Box   Fuchsia Box   Violet Box   OliveDrab Box   OliveDrab Box   OliveDrab Box   OliveDrab 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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