Calicula

Refresh your brain!
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Questions 10 questions in total.
Stopwatch After the start,
To be your problem in the "number",
Please create a formula using a combination of calculation symbol and two numbers.

Number of Topic is if 12,
[8] to clear by pressing the button [4] and [+].

To an elderly person from the child,
Anyone can aim a good time with the correct button operation and simple mental arithmetic.

You also tempered the brain and reflexes
Please aim to join the ranks of the world rankings.