In shops and markets, and still in many places, paying with the seller we need to quickly estimate the amount of purchases and to correctly calculate the size of the delivery, which the seller must return. Can't get the calculator and stand in front of the salesman with a straight face, pressing the button. No, much better to be able to quickly consider in mind. Here and work out. Typing the answer in the appropriate field, press the spacebar, and if You counted correctly, You add 10 points, otherwise the result is zero.

That's definitely not like in this game is the fact that to confirm your enter your reply have a mouse, and then to enter the next answer, again you need to click the window to enter. It's uncomfortable...

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You can play the game WE BELIEVE WITHOUT A CALCULATOR online 24 hours a day for free. It is no need to download and install it on your computer, and it is also not required you to be the registered user. Just ckick and enjoy. See also a set of related games below on that you might be interested to look.