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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