Basic Subtraction Lesson 11: Number 11

Here's an easy example:

12
-
11
=
1

-

=

MidnightBlue Box   Orchid Box   Khaki Box   DarkViolet Box   DarkCyan Box   Fuchsia Box   Yellow Box   Pink Box   Aquamarine Box   Thistle Box   Maroon Box   DarkMagenta Box  minus     MidnightBlue Box   Orchid Box   Khaki Box   DarkViolet Box   DarkCyan Box   Fuchsia Box   Yellow Box   Pink Box   Aquamarine Box   Thistle Box   Maroon Box  equals     DarkMagenta Box

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

Here's another example:

16
-
11
=
5

-

=

MediumPurple Box   MediumTurquoise Box   SlateBlue Box   Purple Box   Peru Box   OliveDrab Box   RoyalBlue Box   BlueViolet Box   MediumOrchid Box   SpringGreen Box   LawnGreen Box   MediumSpringGreen Box   Coral Box   MediumAquamarine Box   SkyBlue Box   DarkBlue Box  minus     MediumPurple Box   MediumTurquoise Box   SlateBlue Box   Purple Box   Peru Box   OliveDrab Box   RoyalBlue Box   BlueViolet Box   MediumOrchid Box   SpringGreen Box   LawnGreen Box  equals     MediumSpringGreen Box   Coral Box   MediumAquamarine Box   SkyBlue Box   DarkBlue Box

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

Try this problem.

19
-
11
=

-

=

DarkGreen Box   PowderBlue Box   Violet Box   Teal Box   Tan Box   BurlyWood Box   Sienna Box   LimeGreen Box   Goldenrod Box   DarkSlateBlue Box   GreenYellow Box   Wheat Box   Blue Box   DarkGoldenrod Box   DarkOliveGreen Box   Olive Box   Chocolate Box   MediumVioletRed Box   DeepSkyBlue Box  minus     DarkGreen Box   PowderBlue Box   Violet Box   Teal Box   Tan Box   BurlyWood Box   Sienna Box   LimeGreen Box   Goldenrod Box   DarkSlateBlue Box   GreenYellow Box  equals     Wheat Box   Blue Box   DarkGoldenrod Box   DarkOliveGreen Box   Olive Box   Chocolate Box   MediumVioletRed Box   DeepSkyBlue Box

We start with nineteen boxes, take away eleven boxes, and now have eight 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:

11 - 11 =   0
12 - 11 =   1
13 - 11 =   2
14 - 11 =   3
15 - 11 =   4
16 - 11 =   5
17 - 11 =   6
18 - 11 =   7
19 - 11 =   8
20 - 11 =   9
21 - 11 = 10
22 - 11 = 11
23 - 11 = 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.