Basic Subtraction Lesson 3: Number 3

Here's an easy example:

5
-
3
=
2

-

=

DarkBlue Box   DarkSeaGreen Box   MediumVioletRed Box   Magenta Box   MediumAquamarine Box  minus     DarkBlue Box   DarkSeaGreen Box   MediumVioletRed Box  equals     Magenta Box   MediumAquamarine Box

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

Here's another example:

9
-
3
=
6

-

=

PowderBlue Box   BurlyWood Box   SandyBrown Box   Plum Box   Blue Box   DarkSlateBlue Box   Sienna Box   BlueViolet Box   SteelBlue Box  minus     PowderBlue Box   BurlyWood Box   SandyBrown Box  equals     Plum Box   Blue Box   DarkSlateBlue Box   Sienna Box   BlueViolet Box   SteelBlue Box

We start with nine boxes, take away three boxes, and now have six boxes. We take away three boxes from our nine boxes to get six boxes.

Try this problem.

10
-
3
=

-

=

MediumSeaGreen Box   Chartreuse Box   Maroon Box   SkyBlue Box   Goldenrod Box   DarkKhaki Box   Empty Box   RoyalBlue Box   DarkMagenta Box   Lavender Box  minus     MediumSeaGreen Box   Chartreuse Box   Maroon Box  equals     SkyBlue Box   Goldenrod Box   DarkKhaki Box   Empty Box   RoyalBlue Box   DarkMagenta Box   Lavender Box

We start with ten boxes, take away three boxes, and now have seven 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:

3 - 3 =   0
4 - 3 =   1
5 - 3 =   2
6 - 3 =   3
7 - 3 =   4
8 - 3 =   5
9 - 3 =   6
10 - 3 =   7
11 - 3 =   8
12 - 3 =   9
13 - 3 = 10
14 - 3 = 11
15 - 3 = 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.