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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   Pink Box   Indigo Box   DarkOrange Box   DeepSkyBlue Box   DarkSlateBlue Box   SaddleBrown Box   Purple Box   Fuchsia Box   Tan Box   YellowGreen Box   MediumPurple Box   Plum Box  minus     Pink Box   Indigo Box   DarkOrange Box   DeepSkyBlue Box   DarkSlateBlue Box   SaddleBrown Box   Purple Box   Fuchsia Box   Tan Box   YellowGreen Box  equals     MediumPurple Box   Plum 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
 
                                
-
                    
=
            
 
   SandyBrown Box   MediumSeaGreen Box   Navy Box   SkyBlue Box   LawnGreen Box   DarkGoldenrod Box   Gold Box   Chocolate Box   LimeGreen Box   DarkOliveGreen Box   Turquoise Box   Aquamarine Box   RosyBrown Box   DarkBlue Box   BurlyWood Box   MediumVioletRed Box  minus     SandyBrown Box   MediumSeaGreen Box   Navy Box   SkyBlue Box   LawnGreen Box   DarkGoldenrod Box   Gold Box   Chocolate Box   LimeGreen Box   DarkOliveGreen Box  equals     Turquoise Box   Aquamarine Box   RosyBrown Box   DarkBlue Box   BurlyWood 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
=
 
                                        
-
                    
=
                    
 
   PowderBlue Box   Lavender Box   SpringGreen Box   Empty Box   ForestGreen Box   Chartreuse Box   Orchid Box   SteelBlue Box   Olive Box   CadetBlue Box   Goldenrod Box   Blue Box   RoyalBlue Box   HotPink Box   Yellow Box   Coral Box   MediumOrchid Box   DarkViolet Box   MediumSlateBlue Box   Brown Box  minus     PowderBlue Box   Lavender Box   SpringGreen Box   Empty Box   ForestGreen Box   Chartreuse Box   Orchid Box   SteelBlue Box   Olive Box   CadetBlue Box  equals     Goldenrod Box   Blue Box   RoyalBlue Box   HotPink Box   Yellow Box   Coral Box   MediumOrchid Box   DarkViolet Box   MediumSlateBlue Box   Brown 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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