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Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2
 
                        
-
                    
=
    
 
   DeepSkyBlue Box   Green Box   LimeGreen Box   Violet Box   DarkKhaki Box   MidnightBlue Box   DodgerBlue Box   Goldenrod Box   HotPink Box   MediumSlateBlue Box   MediumSeaGreen Box   RoyalBlue Box  minus     DeepSkyBlue Box   Green Box   LimeGreen Box   Violet Box   DarkKhaki Box   MidnightBlue Box   DodgerBlue Box   Goldenrod Box   HotPink Box   MediumSlateBlue Box  equals     MediumSeaGreen Box   RoyalBlue 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
 
                                
-
                    
=
            
 
   MediumOrchid Box   Indigo Box   Lavender Box   DarkTurquoise Box   DarkSlateBlue Box   CornflowerBlue Box   DeepPink Box   Teal Box   DarkSeaGreen Box   Chocolate Box   Peru Box   YellowGreen Box   MediumPurple Box   Turquoise Box   SteelBlue Box   DarkGreen Box  minus     MediumOrchid Box   Indigo Box   Lavender Box   DarkTurquoise Box   DarkSlateBlue Box   CornflowerBlue Box   DeepPink Box   Teal Box   DarkSeaGreen Box   Chocolate Box  equals     Peru Box   YellowGreen Box   MediumPurple Box   Turquoise Box   SteelBlue Box   DarkGreen 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
=
 
                                        
-
                    
=
                    
 
   ForestGreen Box   Thistle Box   SandyBrown Box   Empty Box   Cyan Box   DarkOliveGreen Box   Chartreuse Box   Olive Box   Aqua Box   Sienna Box   Khaki Box   DarkGoldenrod Box   DarkOrchid Box   Plum Box   LawnGreen Box   Wheat Box   SeaGreen Box   DarkMagenta Box   Maroon Box   BlueViolet Box  minus     ForestGreen Box   Thistle Box   SandyBrown Box   Empty Box   Cyan Box   DarkOliveGreen Box   Chartreuse Box   Olive Box   Aqua Box   Sienna Box  equals     Khaki Box   DarkGoldenrod Box   DarkOrchid Box   Plum Box   LawnGreen Box   Wheat Box   SeaGreen Box   DarkMagenta Box   Maroon Box   BlueViolet 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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