Question

1+2·3+4·5=55 Insert parentheses to make these equalities correct

Answer 1

The second row is the answer

Answer 2

To make the equality correct, insert parentheses to indicate the order of operations: 1 + (2・3) + (4・5) = 27.

Step-by-step explanation:

In order to make the equality correct, we need to insert parentheses to indicate the order of operations.

1. Starting from left to right, we first calculate 2・3 = 6.
2. Then, we perform the addition: 1 + 6 + 4・5 = 1 + 6 + 20 = 27.

Therefore, the correct expression with added parentheses is: 1 + (2・3) + (4・5) = 27.

Learn more about Order of operations