Question

Расставь скобки такк, чтобы равенства были верными.7+2*9-4=77 9+18:3+6=117+2*9-4=17 9+18:3+6=15

Answer 1

(7+2)*9-4=77
7+2*(9-4)=17
9+18:(3+6)=11
(9+10):3+6=15

Answer 2

(7+2)*9-4=77
7+(2*9)-4=17
9+18:(3+6)=11
(9+18):3+6=15

Answer 3

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

Explanation: To make the equation 7 + 2 * 9 - 4 = 77 true, we need to perform the multiplication before addition and subtraction. The correct way to do this is to multiply 2 by 9 first, which gives us 18. Then we add 7 and subtract 4, resulting in 21. Therefore, the equation should be written as (7 + (2 * 9)) - 4 = 77.

Similarly, to make the equation 17 + 9 + 18 : 3 + 6 = 15 true, we need to perform the division before addition. The correct way to do this is to divide 18 by 3 first, which gives us 6. Then we add 17, 9, and 6, resulting in 32. Finally, we add 32 and 6, which equals 38. Therefore, the equation should be written as 17 + 9 + (18 : 3) + 6 = 15.