Basic Subtraction Lesson 3: Number 3

Here's an easy example:

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:

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.

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.

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