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Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1
 
                          
-
                        
=
  
 
   RoyalBlue Box   DarkGoldenrod Box   DarkOrange Box   DarkSlateBlue Box   Thistle Box   Cyan Box   Coral Box   RosyBrown Box   MidnightBlue Box   LimeGreen Box   GreenYellow Box   MediumOrchid Box   SlateBlue Box  minus     RoyalBlue Box   DarkGoldenrod Box   DarkOrange Box   DarkSlateBlue Box   Thistle Box   Cyan Box   Coral Box   RosyBrown Box   MidnightBlue Box   LimeGreen Box   GreenYellow Box   MediumOrchid Box  equals     SlateBlue 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
 
                                
-
                        
=
        
 
   SteelBlue Box   SkyBlue Box   DarkOliveGreen Box   Aqua Box   Goldenrod Box   MediumPurple Box   MediumSeaGreen Box   DarkSeaGreen Box   DeepPink Box   Wheat Box   Pink Box   MediumBlue Box   BlueViolet Box   Orchid Box   SeaGreen Box   MediumTurquoise Box  minus     SteelBlue Box   SkyBlue Box   DarkOliveGreen Box   Aqua Box   Goldenrod Box   MediumPurple Box   MediumSeaGreen Box   DarkSeaGreen Box   DeepPink Box   Wheat Box   Pink Box   MediumBlue Box  equals     BlueViolet Box   Orchid Box   SeaGreen Box   MediumTurquoise 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
=
 
                                            
-
                        
=
                    
 
   Maroon Box   Olive Box   Magenta Box   Peru Box   HotPink Box   SandyBrown Box   Navy Box   DarkCyan Box   Lavender Box   DarkMagenta Box   ForestGreen Box   Green Box   DarkTurquoise Box   Gold Box   DeepSkyBlue Box   Teal Box   CornflowerBlue Box   Chartreuse Box   DarkGreen Box   DarkGreen Box   DarkGreen Box   DarkGreen Box  minus     Maroon Box   Olive Box   Magenta Box   Peru Box   HotPink Box   SandyBrown Box   Navy Box   DarkCyan Box   Lavender Box   DarkMagenta Box   ForestGreen Box   Green Box  equals     DarkTurquoise Box   Gold Box   DeepSkyBlue Box   Teal Box   CornflowerBlue Box   Chartreuse Box   DarkGreen Box   DarkGreen Box   DarkGreen Box   DarkGreen 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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