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Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1
 
                          
-
                        
=
  
 
   Orchid Box   Blue Box   MediumPurple Box   SlateBlue Box   Green Box   RoyalBlue Box   DarkSeaGreen Box   MediumTurquoise Box   SaddleBrown Box   Maroon Box   GreenYellow Box   Chartreuse Box   HotPink Box  minus     Orchid Box   Blue Box   MediumPurple Box   SlateBlue Box   Green Box   RoyalBlue Box   DarkSeaGreen Box   MediumTurquoise Box   SaddleBrown Box   Maroon Box   GreenYellow Box   Chartreuse Box  equals     HotPink 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
 
                                
-
                        
=
        
 
   DarkOrange Box   Chocolate Box   Goldenrod Box   Wheat Box   Peru Box   Khaki Box   CadetBlue Box   YellowGreen Box   SeaGreen Box   DodgerBlue Box   MediumSeaGreen Box   DarkGreen Box   DarkGoldenrod Box   LimeGreen Box   Coral Box   Plum Box  minus     DarkOrange Box   Chocolate Box   Goldenrod Box   Wheat Box   Peru Box   Khaki Box   CadetBlue Box   YellowGreen Box   SeaGreen Box   DodgerBlue Box   MediumSeaGreen Box   DarkGreen Box  equals     DarkGoldenrod Box   LimeGreen Box   Coral Box   Plum 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
=
 
                                            
-
                        
=
                    
 
   MediumBlue Box   Aquamarine Box   MediumSpringGreen Box   Thistle Box   MediumAquamarine Box   MediumVioletRed Box   OliveDrab Box   MidnightBlue Box   DarkKhaki Box   Empty Box   SkyBlue Box   DarkViolet Box   Violet Box   Gold Box   Yellow Box   DarkOrchid Box   Lavender Box   Indigo Box   BurlyWood Box   BurlyWood Box   BurlyWood Box   BurlyWood Box  minus     MediumBlue Box   Aquamarine Box   MediumSpringGreen Box   Thistle Box   MediumAquamarine Box   MediumVioletRed Box   OliveDrab Box   MidnightBlue Box   DarkKhaki Box   Empty Box   SkyBlue Box   DarkViolet Box  equals     Violet Box   Gold Box   Yellow Box   DarkOrchid Box   Lavender Box   Indigo Box   BurlyWood Box   BurlyWood Box   BurlyWood Box   BurlyWood 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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