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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   ForestGreen Box   DarkGreen Box   PowderBlue Box   Teal Box   Yellow Box   DarkBlue Box   YellowGreen Box   Chocolate Box   Aqua Box   DarkViolet Box   DarkOrange Box   Orchid Box  minus     ForestGreen Box   DarkGreen Box   PowderBlue Box   Teal Box   Yellow Box   DarkBlue Box   YellowGreen Box   Chocolate Box   Aqua Box   DarkViolet Box  equals     DarkOrange Box   Orchid Box

We start with twelve boxes, take away ten boxes, and now have two boxes. We take away ten boxes from our twelve boxes to get two boxes.


Here's another example:

16
-
10
=
6
 
                                
-
                    
=
            
 
   Chartreuse Box   Fuchsia Box   RoyalBlue Box   MediumTurquoise Box   Blue Box   CornflowerBlue Box   Purple Box   Wheat Box   SpringGreen Box   Goldenrod Box   DarkKhaki Box   DarkGoldenrod Box   GreenYellow Box   MediumSpringGreen Box   DarkOrchid Box   MediumVioletRed Box  minus     Chartreuse Box   Fuchsia Box   RoyalBlue Box   MediumTurquoise Box   Blue Box   CornflowerBlue Box   Purple Box   Wheat Box   SpringGreen Box   Goldenrod Box  equals     DarkKhaki Box   DarkGoldenrod Box   GreenYellow Box   MediumSpringGreen Box   DarkOrchid Box   MediumVioletRed Box

We start with sixteen boxes, take away ten boxes, and now have six boxes. We take away ten boxes from our sixteen boxes to get six boxes.


Try this problem.

20
-
10
=
 
                                        
-
                    
=
                    
 
   DarkSeaGreen Box   DeepSkyBlue Box   MediumPurple Box   MediumOrchid Box   OliveDrab Box   Empty Box   DodgerBlue Box   Tan Box   Cyan Box   Magenta Box   Coral Box   LimeGreen Box   BlueViolet Box   Violet Box   CadetBlue Box   BurlyWood Box   LawnGreen Box   DarkMagenta Box   SteelBlue Box   SlateBlue Box  minus     DarkSeaGreen Box   DeepSkyBlue Box   MediumPurple Box   MediumOrchid Box   OliveDrab Box   Empty Box   DodgerBlue Box   Tan Box   Cyan Box   Magenta Box  equals     Coral Box   LimeGreen Box   BlueViolet Box   Violet Box   CadetBlue Box   BurlyWood Box   LawnGreen Box   DarkMagenta Box   SteelBlue Box   SlateBlue Box

We start with twenty boxes, take away ten 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:

10 - 10 =   0
11 - 10 =   1
12 - 10 =   2
13 - 10 =   3
14 - 10 =   4
15 - 10 =   5
16 - 10 =   6
17 - 10 =   7
18 - 10 =   8
19 - 10 =   9
20 - 10 = 10
21 - 10 = 11
22 - 10 = 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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