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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   Thistle Box   DeepSkyBlue Box   DarkKhaki Box   ForestGreen Box   Chocolate Box   DarkViolet Box   Gold Box   SteelBlue Box   DarkGreen Box   Indigo Box   Wheat Box   Maroon Box  minus     Thistle Box   DeepSkyBlue Box   DarkKhaki Box   ForestGreen Box   Chocolate Box   DarkViolet Box   Gold Box   SteelBlue Box   DarkGreen Box   Indigo Box  equals     Wheat Box   Maroon 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
 
                                
-
                    
=
            
 
   Navy Box   LawnGreen Box   CadetBlue Box   RoyalBlue Box   SaddleBrown Box   PowderBlue Box   BlueViolet Box   DarkOrange Box   MediumVioletRed Box   Orchid Box   Fuchsia Box   Plum Box   MediumAquamarine Box   SkyBlue Box   Olive Box   LimeGreen Box  minus     Navy Box   LawnGreen Box   CadetBlue Box   RoyalBlue Box   SaddleBrown Box   PowderBlue Box   BlueViolet Box   DarkOrange Box   MediumVioletRed Box   Orchid Box  equals     Fuchsia Box   Plum Box   MediumAquamarine Box   SkyBlue Box   Olive Box   LimeGreen 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
=
 
                                        
-
                    
=
                    
 
   HotPink Box   SandyBrown Box   DarkGoldenrod Box   YellowGreen Box   DarkCyan Box   DodgerBlue Box   MediumOrchid Box   GreenYellow Box   BurlyWood Box   Lavender Box   Yellow Box   DeepPink Box   MediumSlateBlue Box   Turquoise Box   RosyBrown Box   MidnightBlue Box   Green Box   MediumSeaGreen Box   Purple Box   Magenta Box  minus     HotPink Box   SandyBrown Box   DarkGoldenrod Box   YellowGreen Box   DarkCyan Box   DodgerBlue Box   MediumOrchid Box   GreenYellow Box   BurlyWood Box   Lavender Box  equals     Yellow Box   DeepPink Box   MediumSlateBlue Box   Turquoise Box   RosyBrown Box   MidnightBlue Box   Green Box   MediumSeaGreen Box   Purple Box   Magenta 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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