Add and subtract quiz

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Instructions

This tests basic addition and subtraction facts that should be known quickly from memory.

Fast is 3 secs per question
Medium is 6 secs per question
Slow is 10 secs per question

If you are too slow, your score won't increase.

Notes and Credits

MathMammoth lists them as the following:

[6+5 to 6+9], [7+4 to 7+9], [8+3 to 8+9], [9+2 to 9+9]

[12-3 to 12-9], [13-4 to 13-9], [14-5 to 14-9], [15-6 to 15-9],
[16-7 to 16-9], [17-8 to 17-9], [18-9]

For addition, the code randomly picks a number between 6 through 9 for the first number and between 2 and 9 for the second number. Only if the total is more than 10, is the question asked. This avoids asking too simple facts not included in math mammoth's list such as 6+2.

For subtraction, a similar trial and error method in finding the question was coded, this time, requiring an answer less than 10.

Shared: 27 Jul 2018 Modified: 27 Jul 2018
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