Basic Subtraction Lesson 10: Number 10

Here's an easy example:

12
-
10
=
2

-

=

DarkViolet Box   RosyBrown Box   CadetBlue Box   SlateBlue Box   Indigo Box   Turquoise Box   Sienna Box   Gold Box   PowderBlue Box   Purple Box   Magenta Box   SpringGreen Box  minus     DarkViolet Box   RosyBrown Box   CadetBlue Box   SlateBlue Box   Indigo Box   Turquoise Box   Sienna Box   Gold Box   PowderBlue Box   Purple Box  equals     Magenta Box   SpringGreen 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

-

=

Cyan Box   Yellow Box   MediumAquamarine Box   Coral Box   RoyalBlue Box   Chocolate Box   Green Box   DarkOrange Box   Peru Box   DarkGreen Box   CornflowerBlue Box   Empty Box   Blue Box   MediumPurple Box   Fuchsia Box   HotPink Box  minus     Cyan Box   Yellow Box   MediumAquamarine Box   Coral Box   RoyalBlue Box   Chocolate Box   Green Box   DarkOrange Box   Peru Box   DarkGreen Box  equals     CornflowerBlue Box   Empty Box   Blue Box   MediumPurple Box   Fuchsia Box   HotPink 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
=

-

=

SeaGreen Box   SkyBlue Box   SandyBrown Box   Plum Box   Wheat Box   MediumOrchid Box   BurlyWood Box   Teal Box   DarkSlateBlue Box   MediumSeaGreen Box   DarkOliveGreen Box   YellowGreen Box   MidnightBlue Box   DarkCyan Box   Pink Box   DarkGoldenrod Box   BlueViolet Box   Tan Box   Aqua Box   DarkOrchid Box  minus     SeaGreen Box   SkyBlue Box   SandyBrown Box   Plum Box   Wheat Box   MediumOrchid Box   BurlyWood Box   Teal Box   DarkSlateBlue Box   MediumSeaGreen Box  equals     DarkOliveGreen Box   YellowGreen Box   MidnightBlue Box   DarkCyan Box   Pink Box   DarkGoldenrod Box   BlueViolet Box   Tan Box   Aqua Box   DarkOrchid 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.