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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   SteelBlue Box   GreenYellow Box   MidnightBlue Box   DarkGreen Box   Blue Box   Brown Box   Coral Box   Tan Box   DarkOrchid Box   DeepPink Box   Fuchsia Box   MediumOrchid Box  minus     SteelBlue Box   GreenYellow Box   MidnightBlue Box   DarkGreen Box   Blue Box   Brown Box   Coral Box   Tan Box   DarkOrchid Box   DeepPink Box  equals     Fuchsia Box   MediumOrchid 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
 
                                
-
                    
=
            
 
   Empty Box   CadetBlue Box   MediumVioletRed Box   ForestGreen Box   SaddleBrown Box   PowderBlue Box   Orchid Box   Gold Box   BurlyWood Box   DarkCyan Box   SlateBlue Box   DarkViolet Box   LawnGreen Box   Indigo Box   LimeGreen Box   Purple Box  minus     Empty Box   CadetBlue Box   MediumVioletRed Box   ForestGreen Box   SaddleBrown Box   PowderBlue Box   Orchid Box   Gold Box   BurlyWood Box   DarkCyan Box  equals     SlateBlue Box   DarkViolet Box   LawnGreen Box   Indigo Box   LimeGreen Box   Purple 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
=
 
                                        
-
                    
=
                    
 
   MediumSeaGreen Box   SeaGreen Box   Aquamarine Box   DarkKhaki Box   Turquoise Box   Magenta Box   Teal Box   CornflowerBlue Box   Khaki Box   Sienna Box   Thistle Box   MediumAquamarine Box   DarkGoldenrod Box   Violet Box   Goldenrod Box   Navy Box   MediumSpringGreen Box   DarkMagenta Box   DarkTurquoise Box   Cyan Box  minus     MediumSeaGreen Box   SeaGreen Box   Aquamarine Box   DarkKhaki Box   Turquoise Box   Magenta Box   Teal Box   CornflowerBlue Box   Khaki Box   Sienna Box  equals     Thistle Box   MediumAquamarine Box   DarkGoldenrod Box   Violet Box   Goldenrod Box   Navy Box   MediumSpringGreen Box   DarkMagenta Box   DarkTurquoise Box   Cyan 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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