Tremble, unhappy, Old Man Hottabych will test your knowledge of mathematics

Mathematics lessons for a child They may seem boring and complicated, they may not like it at all. But they are still necessary. After all, without a good knowledge of mathematics, it will be difficult for a student to understand other subjects. And in adulthood, it is much more difficult to succeed without a qualitative mathematical basis.

And today's edition. "Site" It invites readers to solve a few tricky examples from the school curriculum. Mathematics teachers and excellent students will laugh at these tasks. But the threesomes and some goodies will think about it. And that's good. After all, solving difficult mathematical examples and problems is quite useful for the mind.



Mathematics lessons for a child

1. The first example is surprising because only 50% of readers get it right. After all, the representatives of the second half agree on a completely different answer, and fiercely defend their rightness. Keep in mind that you can get confused here too. So do not rush and decide carefully.
   
   
   
   
2. A lot of threes are misleading. A person imagines that the example is too easy, and immediately gives a solution. And then it turns out that the correct answer here is completely different. Take your time, because making a mistake is not surprising. Better double-check.
   
   
   
   
3. Without slowing down, solve the last example just as successfully. Units and twos can also be quite insidious, because there are a variety of arithmetic operations. Can you handle all this diversity? Don’t forget to check out our answers below.
   
   
   
   

Tips and answers

1. In what order do you do everything? First brackets, then division and multiplication. In this case we get: 21 ÷ 7(1 + 2) = 21 ÷ 7 × 3 = 3 × 3 = 9. As you can see, we did not have any difficulties in the decision process. And you?
   
   
   
   
2. Here we have to deal with negative numbers. We hope that you remember well from the school curriculum what it is and how to work with it. Therefore, no doubt solve the example: 3 + 3 + 3 (0 - 3) = 3 + 3 + 3 (-3) = 3 + 3 - 9 = -3.
   
   
   
   
3. In the last example, we first perform multiplication and division, and only then add. 1 + 2 × 2 + 2 ÷ 2 = 1 + 4 + 1 = 6. Looks like we made no mistakes.
   
   
   
   

Don’t forget to share your calculations and answers in the comments. Also solve other tricky math problems. Or take on complex puzzles that will make any smart person think thoroughly.