Order of Operations:

To simplify the expression follow the order of operations: (PEMDAS)

1.      Evaluate the expressions inside the Parenthesis/Brackets (P).

2.      Evaluate Powers/Exponents (E).

3.      Multiply and/or Divide in order from left to right (MD).

4.      Add and/or Subtract in order from left to right (AS). 

A simple technique for remembering the order of operations is turned

into phrase "Please Excuse My Dear Aunty Sally".

The expression is .

                 (Substitute a = 3, b = 0.3, c = and d = )

                 (Product of same signs is positive)

Simplify the expression uisng order of operations (PEMDAS).

Since there are no parentheses and powers, first operation is multiplication.

                      (Multiply: )

Next operation is addition.

                        (Add: 3 + 1 = 4)

                         (Multiply numerator and denominator by 10)

The value of the expression is 40.