An example of an old-school teacher to make the brain work at full capacity

Interesting mathematical problems can make even an adult person postpone their affairs. It’s like going back decades to a high school classroom where a strict math teacher wants to test your knowledge. Find out if you remember those old rules and formulas.

Interesting mathematical problems

In the first example, there are brackets, and they attract the increased attention of everyone who has always passed mathematics at least on the “four”. But there is also multiplication and addition. How to cope with all this, so as not to make children's mistakes in the example of children? Try to figure it out, you're gonna make it.
In the second example, there are no brackets, but this does not make the task easier. And we see that, and we see that, and we see that. Take a closer look at the fours to figure out how to divide and multiply them.
Again, there are no brackets, but this is no reason to relax. This is where we see “3” to zero. And hardly every reader remembers how much it will be and how in this case it is necessary to decide the example. Dig into your memory to find the appropriate rule. And don’t forget to check our tips in the second part of the article.

Tips and answers

Brackets, multiplication and addition. It is in this order that arithmetic operations must be performed. No other way. So we get 7 + 3(1 + 4) = 7 + 3 × 5 = 7 + 15 = 22. What number did you find?
Divide, multiply, and then perform the remaining arithmetic operations from left to right. And then we get 4 - 4 ÷ 4 + 4 × 4 = 4 - 1 + 16 = 3 + 16 = 19.
Any number that is different from zero is equal to one. Remembering this simple rule from school, we immediately understand how to cope with our mathematical example. So 3 + 3 × 3 - 3o = 3 + 3 × 3 - 1 = 3 + 9 - 1 = 11.

Did you get it right? Admit and share your answers in the comments. See our other examples as well. And also try to find solutions to mathematical puzzles.

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