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Basic Subtraction Lesson 7: Number 7

Here's an easy example:

8
-
7
=
1
 
                
-
              
=
  
 
   Violet Box   Khaki Box   Lavender Box   RoyalBlue Box   MediumPurple Box   MediumOrchid Box   Teal Box   MediumSeaGreen Box  minus     Violet Box   Khaki Box   Lavender Box   RoyalBlue Box   MediumPurple Box   MediumOrchid Box   Teal Box  equals     MediumSeaGreen Box

We start with eight boxes, take away seven boxes, and now have one box. We take away seven boxes from our eight boxes to get one box.


Here's another example:

12
-
7
=
5
 
                        
-
              
=
          
 
   DarkCyan Box   BlueViolet Box   DarkSlateBlue Box   MediumTurquoise Box   HotPink Box   Yellow Box   MediumSpringGreen Box   DodgerBlue Box   Goldenrod Box   Magenta Box   Peru Box   Tan Box  minus     DarkCyan Box   BlueViolet Box   DarkSlateBlue Box   MediumTurquoise Box   HotPink Box   Yellow Box   MediumSpringGreen Box  equals     DodgerBlue Box   Goldenrod Box   Magenta Box   Peru Box   Tan Box

We start with twelve boxes, take away seven boxes, and now have five boxes. We take away seven boxes from our twelve boxes to get five boxes.


Try this problem.

18
-
7
=
 
                                    
-
              
=
                      
 
   Peru Box   Tan Box   DarkMagenta Box   DarkOrange Box   Pink Box   Maroon Box   ForestGreen Box   Navy Box   SkyBlue Box   DarkSeaGreen Box   SlateBlue Box   Orchid Box   LimeGreen Box   Aqua Box   Coral Box   Chocolate Box   Gold Box   GreenYellow Box  minus     Peru Box   Tan Box   DarkMagenta Box   DarkOrange Box   Pink Box   Maroon Box   ForestGreen Box  equals     Navy Box   SkyBlue Box   DarkSeaGreen Box   SlateBlue Box   Orchid Box   LimeGreen Box   Aqua Box   Coral Box   Chocolate Box   Gold Box   GreenYellow Box

We start with eighteen boxes, take away seven boxes, and now have eleven 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:

  7 - 7 =   0
  8 - 7 =   1
  9 - 7 =   2
10 - 7 =   3
11 - 7 =   4
12 - 7 =   5
13 - 7 =   6
14 - 7 =   7
15 - 7 =   8
16 - 7 =   9
17 - 7 = 10
18 - 7 = 11
19 - 7 = 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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