Solve: 20-(0÷4×3)+1 Using Order of Operations

Use the order of operations to simplify the following expression. The order of operations states that exponents precede multiplication and division, which in turn precede addition and subtraction, and that parentheses precede all of the above.

Given that multiplication and division precede addition and subtraction, we'll start by calculating the numerical value of the second term from the left. Note that between division and multiplication operations there is no precedence is given according to the order of operations. Therefore we'll perform the operations one after another from left to right - this is considered the natural order of operations. Remember that dividing 0 by any number (except 0) will yield 0, and similarly - multiplying 0 by any number will yield 0:

$20-0:4\cdot3+1= \\ 20-0\cdot3+1=\\ 20-0+1= \\ 21$

Therefore the correct answer is answer A.