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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   MediumOrchid Box   DarkMagenta Box   Coral Box   Plum Box   Indigo Box   DarkOrchid Box   HotPink Box   Sienna Box   SpringGreen Box   GreenYellow Box   Teal Box   YellowGreen Box  minus     MediumOrchid Box   DarkMagenta Box   Coral Box   Plum Box   Indigo Box   DarkOrchid Box   HotPink Box   Sienna Box   SpringGreen Box   GreenYellow Box  equals     Teal Box   YellowGreen 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
 
                                
-
                    
=
            
 
   Yellow Box   PowderBlue Box   Purple Box   CornflowerBlue Box   SkyBlue Box   Pink Box   Turquoise Box   LawnGreen Box   Magenta Box   DarkOrange Box   Thistle Box   Chartreuse Box   SlateBlue Box   Wheat Box   Green Box   MediumAquamarine Box  minus     Yellow Box   PowderBlue Box   Purple Box   CornflowerBlue Box   SkyBlue Box   Pink Box   Turquoise Box   LawnGreen Box   Magenta Box   DarkOrange Box  equals     Thistle Box   Chartreuse Box   SlateBlue Box   Wheat Box   Green Box   MediumAquamarine 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
=
 
                                        
-
                    
=
                    
 
   DarkGoldenrod Box   Aquamarine Box   DarkCyan Box   Goldenrod Box   DarkBlue Box   DarkViolet Box   Chocolate Box   Maroon Box   Tan Box   MediumSpringGreen Box   SteelBlue Box   MediumSeaGreen Box   Khaki Box   MidnightBlue Box   OliveDrab Box   SandyBrown Box   DarkTurquoise Box   Empty Box   Peru Box   Lavender Box  minus     DarkGoldenrod Box   Aquamarine Box   DarkCyan Box   Goldenrod Box   DarkBlue Box   DarkViolet Box   Chocolate Box   Maroon Box   Tan Box   MediumSpringGreen Box  equals     SteelBlue Box   MediumSeaGreen Box   Khaki Box   MidnightBlue Box   OliveDrab Box   SandyBrown Box   DarkTurquoise Box   Empty Box   Peru Box   Lavender 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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