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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   Tan Box   MediumVioletRed Box   Aqua Box   Violet Box   DeepSkyBlue Box   MediumTurquoise Box   BurlyWood Box   DodgerBlue Box   Aquamarine Box   Empty Box   Thistle Box   HotPink Box  minus     Tan Box   MediumVioletRed Box   Aqua Box   Violet Box   DeepSkyBlue Box   MediumTurquoise Box   BurlyWood Box   DodgerBlue Box   Aquamarine Box   Empty Box  equals     Thistle Box   HotPink 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
 
                                
-
                    
=
            
 
   DarkOrchid Box   ForestGreen Box   DarkGoldenrod Box   LimeGreen Box   Turquoise Box   Coral Box   GreenYellow Box   Plum Box   Purple Box   LawnGreen Box   Navy Box   Goldenrod Box   Brown Box   MidnightBlue Box   DarkKhaki Box   PowderBlue Box  minus     DarkOrchid Box   ForestGreen Box   DarkGoldenrod Box   LimeGreen Box   Turquoise Box   Coral Box   GreenYellow Box   Plum Box   Purple Box   LawnGreen Box  equals     Navy Box   Goldenrod Box   Brown Box   MidnightBlue Box   DarkKhaki Box   PowderBlue 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
=
 
                                        
-
                    
=
                    
 
   Green Box   Olive Box   CornflowerBlue Box   MediumAquamarine Box   DarkOrange Box   Wheat Box   Khaki Box   BlueViolet Box   Peru Box   Magenta Box   Cyan Box   MediumPurple Box   YellowGreen Box   DarkMagenta Box   CadetBlue Box   MediumSlateBlue Box   Maroon Box   MediumSpringGreen Box   Chartreuse Box   DarkCyan Box  minus     Green Box   Olive Box   CornflowerBlue Box   MediumAquamarine Box   DarkOrange Box   Wheat Box   Khaki Box   BlueViolet Box   Peru Box   Magenta Box  equals     Cyan Box   MediumPurple Box   YellowGreen Box   DarkMagenta Box   CadetBlue Box   MediumSlateBlue Box   Maroon Box   MediumSpringGreen Box   Chartreuse Box   DarkCyan 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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