Basic Subtraction Lesson 12: Number 12

Here's an easy example:

13
-
12
=
1

-

=

HotPink Box   Yellow Box   MediumSlateBlue Box   Coral Box   Peru Box   LawnGreen Box   PowderBlue Box   MediumSeaGreen Box   DodgerBlue Box   Blue Box   MediumSpringGreen Box   Indigo Box   BlueViolet Box  minus     HotPink Box   Yellow Box   MediumSlateBlue Box   Coral Box   Peru Box   LawnGreen Box   PowderBlue Box   MediumSeaGreen Box   DodgerBlue Box   Blue Box   MediumSpringGreen Box   Indigo Box  equals     BlueViolet Box

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

Here's another example:

16
-
12
=
4

-

=

Green Box   DarkMagenta Box   DarkOrchid Box   Aqua Box   LimeGreen Box   DarkSlateBlue Box   Maroon Box   MediumTurquoise Box   Gold Box   RosyBrown Box   GreenYellow Box   Fuchsia Box   SkyBlue Box   DeepSkyBlue Box   SpringGreen Box   SeaGreen Box  minus     Green Box   DarkMagenta Box   DarkOrchid Box   Aqua Box   LimeGreen Box   DarkSlateBlue Box   Maroon Box   MediumTurquoise Box   Gold Box   RosyBrown Box   GreenYellow Box   Fuchsia Box  equals     SkyBlue Box   DeepSkyBlue Box   SpringGreen Box   SeaGreen Box

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

Try this problem.

22
-
12
=

-

=

MediumVioletRed Box   CornflowerBlue Box   RoyalBlue Box   DeepPink Box   DarkGreen Box   Lavender Box   Teal Box   SlateBlue Box   Thistle Box   MediumAquamarine Box   Chocolate Box   DarkTurquoise Box   Magenta Box   YellowGreen Box   Wheat Box   DarkBlue Box   Empty Box   Sienna Box   OliveDrab Box   OliveDrab Box   OliveDrab Box   OliveDrab Box  minus     MediumVioletRed Box   CornflowerBlue Box   RoyalBlue Box   DeepPink Box   DarkGreen Box   Lavender Box   Teal Box   SlateBlue Box   Thistle Box   MediumAquamarine Box   Chocolate Box   DarkTurquoise Box  equals     Magenta Box   YellowGreen Box   Wheat Box   DarkBlue Box   Empty Box   Sienna Box   OliveDrab Box   OliveDrab Box   OliveDrab Box   OliveDrab Box

We start with twenty-two boxes, take away twelve 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:

12 - 12 =   0
13 - 12 =   1
14 - 12 =   2
15 - 12 =   3
16 - 12 =   4
17 - 12 =   5
18 - 12 =   6
19 - 12 =   7
20 - 12 =   8
21 - 12 =   9
22 - 12 = 10
23 - 12 = 11
24 - 12 = 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.