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Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1
 
                          
-
                        
=
  
 
   DarkKhaki Box   MediumSpringGreen Box   SteelBlue Box   Aqua Box   Chocolate Box   SlateBlue Box   SpringGreen Box   Fuchsia Box   DarkViolet Box   MidnightBlue Box   CadetBlue Box   Brown Box   Purple Box  minus     DarkKhaki Box   MediumSpringGreen Box   SteelBlue Box   Aqua Box   Chocolate Box   SlateBlue Box   SpringGreen Box   Fuchsia Box   DarkViolet Box   MidnightBlue Box   CadetBlue Box   Brown Box  equals     Purple 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
 
                                
-
                        
=
        
 
   MediumVioletRed Box   Peru Box   Khaki Box   SeaGreen Box   RoyalBlue Box   DarkSlateBlue Box   RosyBrown Box   Tan Box   MediumTurquoise Box   Aquamarine Box   MediumSeaGreen Box   Goldenrod Box   Violet Box   Green Box   Wheat Box   CornflowerBlue Box  minus     MediumVioletRed Box   Peru Box   Khaki Box   SeaGreen Box   RoyalBlue Box   DarkSlateBlue Box   RosyBrown Box   Tan Box   MediumTurquoise Box   Aquamarine Box   MediumSeaGreen Box   Goldenrod Box  equals     Violet Box   Green Box   Wheat Box   CornflowerBlue 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
=
 
                                            
-
                        
=
                    
 
   Pink Box   SaddleBrown Box   SandyBrown Box   DarkOliveGreen Box   Plum Box   DodgerBlue Box   BlueViolet Box   Blue Box   Cyan Box   MediumOrchid Box   BurlyWood Box   Coral Box   Maroon Box   DarkMagenta Box   Turquoise Box   ForestGreen Box   DarkGoldenrod Box   DarkTurquoise Box   MediumSlateBlue Box   MediumSlateBlue Box   MediumSlateBlue Box   MediumSlateBlue Box  minus     Pink Box   SaddleBrown Box   SandyBrown Box   DarkOliveGreen Box   Plum Box   DodgerBlue Box   BlueViolet Box   Blue Box   Cyan Box   MediumOrchid Box   BurlyWood Box   Coral Box  equals     Maroon Box   DarkMagenta Box   Turquoise Box   ForestGreen Box   DarkGoldenrod Box   DarkTurquoise Box   MediumSlateBlue Box   MediumSlateBlue Box   MediumSlateBlue Box   MediumSlateBlue 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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