PROBLEMS WITH MATCHES

To train the logic and flexibility of the presentation, solve problems with matches. When they came up with the matches themselves, they hardly expected that someone would use them like this. However, instead of matches, you can also take counting sticks, for example, but with matches it is somehow more convenient, and their size is ideal for these purposes.

So, let's take a closer look at what these tasks are. You can add up a number, a number, or even a mathematical example from matches. Such tasks will be given to you in this game. Only it's not the examples themselves that will have to decide. In each of the tasks, one, two or three matches are placed on the table incorrectly, distorting either the number that is added from them, or the action sign, or the result. You need to guess which of the matches should be moved and how, so that the example becomes correct.

Before each task, you will be shown a requirement for solving it. For example, Remove 1 means that you only need to remove one match to make equality meaningful and fair. Look at the first problem: 9 + 9 = 0-obviously, the equality is incorrect. The task says: Remove 1, that is, you need to remove one match and the example will become correct. Which one? Let's give you a hint. If you remove the vertical match from the plus sign, you will get: 9-9 = 0 is a valid equality. So these tasks are solved.

Among the requirements may be such as: Remove 1, Add 1 — that is, remove one and add one match (in fact, you need to rearrange one of the matches). Or, say: Subtract 8 and 2 — you need to shift the matches so that example 8-2 = ... became correct, i.e.: 8-2 = 6. And so on.

If you have solved the problem correctly, then all the matches on the table will burn out. Don't worry, this is just an animation that confirms the correctness of your decision. If the answer is wrong, then nothing will happen — keep thinking. How can I solve the problem incorrectly? Here you have shifted three matches and you have got the correct equality, but the matches are frozen and do not burn — so the decision is incorrect. This means that the task didn't need to shift three matches like you did, but only two, for example. This happens, by the way. That is, the answer is correct, but the solution is not. Try to think again and find the right solution. Good luck!