|Read More||www.bee-man.us||Important Notice|
NOTE that since division by zero is undefined, for problems that involve this, the correct answer is an upper or lower case u (for undefined) or a period (".").
This page works well with "FireFox" and "Safari" browsers. It coexists with "Internet Explorer".
Use the calculator below to check whether a given report is valid. Type or paste all 32 characters of the report into the field on the left, then press the "Validate" button. The result will appear.
Choose a function to practice (Addition, Subtraction, Multiplication, or Division). When you click the "Start Exercise" button the timer starts. Enter the correct answer using the number keys followed by the "Return" or "Enter" key. If you make a mistake, the error counter will increment and an entry will be made in the error log. No need to use the backspace key. Just type a new answer. You will be stuck there until you get the right answer.
Since division by zero is undefined, for division problems where the divisor is zero, enter "U", "u" or "." (period), whithout the quotes, of course.
The program keeps track of how many problems you have done, how many are left, and the number of errors. Errors are entered in the "Error Log" so that you can review your mistakes.
When you have done all the problems on a given level, a report will appear consisting of 32 characters. The significance of the characters in the report is as follows:
RHB-1-A1-0817-1726-0123-00-20092 RHB : My initials. You should use yours. 1 : Period 1 of the school day. A1 : Addition, level 1. (M = Multiplication, S = Subtraction, D = Division). 0817 : I started doing this set on August 17. 1726 : At 1726 hours (5:26 PM). 0123 : It took me 1 minute and 23 seconds to finish. 00 : I did not make any errors. (00 = zero errors 01 = 1 error etc.). 20092 : A cryptographic check sum of the report. It discourages people from making up a fake "Report". If they do, there is one chance in 100,000 that it will verify correctly.
Seven "levels" of practice are provided. The reason for these is that it is tough to try to learn all 169 combinations of problems for 0..12 all at once. These levels allow you to break the learning down into manageable chunks.
Below is a graphical summary of how the "Levels" work. All even-numbered levels cover only the permutations that were not covered in the next-lower level. Odd-numbered levels cover all possible permutations of numbers up to the limit.
|6||L2 = 45 new|
L3 = 81 total
|9||L4 = 40 new|
L5 = 121 total
|11||L6 = 48 new|
L7 = 169 total
My only reward for writing this is the 15 milliseconds of fame I receive from having my name here. Don't deprive me of that.
You can copy this page by simply doing a "Save As" in your browser and putting it somewhere on your hard drive (or your web site). If you stop there the background will be gone. To preserve the background, copy the following file into this same folder, without changing its name, by again using your browser's "Save As". The next time you refresh the page, the background should be restored: