Subtracting game
This subtracting game will really help you sharpen your basic mathematics skills.
Basically, you have 60 seconds to see how many exercises you can get correctly in 60 seconds
You should use any means necessay to get the answer, such as mental math, paper and pencils.
However, I strongly recommend that you do not use a calculator!
Keep in mind also that the asnwer can be negative!
Here is my guideline to verify how well you are doing:
Easy and 17 points in 60 seconds: Very well, keep up!
Easy and 715 points in 60 seconds: good!
Easy and more than 15 points in 60 seconds: Expert!
Moderate and 14 points in 60 seconds: Very well, keep up!
Moderate and 48 points in 60 seconds : Good!
Moderate and more than 8 points in 60 seconds: Expert!
Difficult and 12 points in 60 seconds: Very well, keep up!
Difficult and 24 points in 60 seconds : Good!
Difficult and more than 4 points in 60 seconds: Expert!

May 21, 17 09:19 PM
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