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Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1
 
                          
-
                        
=
  
 
   DarkTurquoise Box   Cyan Box   Peru Box   RosyBrown Box   DarkGoldenrod Box   Empty Box   DodgerBlue Box   OliveDrab Box   Thistle Box   DarkOrchid Box   DarkOliveGreen Box   Plum Box   SkyBlue Box  minus     DarkTurquoise Box   Cyan Box   Peru Box   RosyBrown Box   DarkGoldenrod Box   Empty Box   DodgerBlue Box   OliveDrab Box   Thistle Box   DarkOrchid Box   DarkOliveGreen Box   Plum Box  equals     SkyBlue 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
 
                                
-
                        
=
        
 
   Yellow Box   DarkSeaGreen Box   MidnightBlue Box   SlateBlue Box   Violet Box   Olive Box   DarkSlateBlue Box   Gold Box   Lavender Box   MediumVioletRed Box   HotPink Box   DarkKhaki Box   DarkOrange Box   SeaGreen Box   Fuchsia Box   MediumSlateBlue Box  minus     Yellow Box   DarkSeaGreen Box   MidnightBlue Box   SlateBlue Box   Violet Box   Olive Box   DarkSlateBlue Box   Gold Box   Lavender Box   MediumVioletRed Box   HotPink Box   DarkKhaki Box  equals     DarkOrange Box   SeaGreen Box   Fuchsia Box   MediumSlateBlue 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
=
 
                                            
-
                        
=
                    
 
   SandyBrown Box   MediumBlue Box   LawnGreen Box   Khaki Box   Navy Box   BlueViolet Box   GreenYellow Box   Purple Box   MediumTurquoise Box   DarkMagenta Box   MediumSpringGreen Box   Wheat Box   CadetBlue Box   DarkBlue Box   MediumPurple Box   Teal Box   Goldenrod Box   MediumAquamarine Box   Brown Box   Brown Box   Brown Box   Brown Box  minus     SandyBrown Box   MediumBlue Box   LawnGreen Box   Khaki Box   Navy Box   BlueViolet Box   GreenYellow Box   Purple Box   MediumTurquoise Box   DarkMagenta Box   MediumSpringGreen Box   Wheat Box  equals     CadetBlue Box   DarkBlue Box   MediumPurple Box   Teal Box   Goldenrod Box   MediumAquamarine Box   Brown Box   Brown Box   Brown Box   Brown 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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