Directions: Evaluate the following expression using the correct order of operations.

84 + 47 − 19 + 36 ÷ 2 + (21 of 1) − 40 = ?

The correct answer is 111.

To evaluate the given mathematical expression, we must follow the order of operations specified by the BODMAS rule (Brackets, Orders, Division and Multiplication, Addition and Subtraction):

The given expression is:

$84+47-19+36÷2+\left(21\text{of}1\right)-40$

Step 1: Evaluate the term inside the brackets.
The operation inside the bracket is "21 of 1", where "of" represents multiplication:

$21\text{of}1=21\times 1=21$

Substituting this back into the main expression gives:

$84+47-19+36÷2+21-40$

Step 2: Perform the division.
Divide 36 by 2:

$36÷2=18$

Replacing the division part in the expression gives:

$84+47-19+18+21-40$

Step 3: Perform addition and subtraction from left to right.

First, add 84 and 47:

$84+47=131$

Next, subtract 19:

$131-19=112$

Next, add 18:

$112+18=130$

Next, add 21:

$130+21=151$

Finally, subtract 40:

$151-40=111$

Therefore, the evaluated value of the expression is 111.