Question

Расставь скобки так, чтобы равенства были верными 7+2*9-4=77 7+2*9-4=17 9+18:3+6=11 9+18:3+6=15

Answer 1

(7+2)*9-4=77  

7+2*(9-4)=17

(9+18):3+6=15

9+18:(3+6)=11

Answer 2

Вот решение ____________

Answer 3

To make the equations true, we need to rearrange the numbers and add appropriate parentheses. Let's do it step by step:

1. 7 + 2 * 9 - 4 = 77

To make this equation true, we need to add parentheses as follows:

(7 + 2) * (9 - 4) = 77 9 * 5 = 77 45 = 77

This equation is still not true, so there seems to be an error in the problem statement. The correct equation should be: (7 + 2) * (9 - 4) = 45

2. 7 + 2 * 9 - 4 = 17

To make this equation true, we need to add parentheses as follows:

7 + (2 * 9) - 4 = 17 7 + 18 - 4 = 17 21 - 4 = 17 17 = 17

This equation is true.

3. 9 + 18 : 3 + 6 = 11

To make this equation true, we need to add parentheses as follows:

(9 + 18) : (3 + 6) = 11 27 : 9 = 11 3 = 11

This equation is still not true. It seems there is an error in the problem statement again. The correct equation should be: (9 + 18) : (3 + 6) = 27 : 9 = 3

4. 9 + 18 : 3 + 6 = 15

To make this equation true, we need to add parentheses as follows:

9 + (18 : 3) + 6 = 15 9 + 6 + 6 = 15 15 = 15

This equation is true.

So, the correct equations are:

1. (7 + 2) * (9 - 4) = 45
2. 7 + (2 * 9) - 4 = 17
3. (9 + 18) : (3 + 6) = 3
4. 9 + (18 : 3) + 6 = 15