Question

Difficulty: EasyOrder of Operations and Number Properties

What is the value of the expression 3×(4210)5×23 \times (4^2 - 10) - 5 \times |-2|?

Answer: 8

Answer

The correct value of the expression is 8.
Evaluating the expression following the order of operations (parentheses, exponents, multiplication/division, and addition/subtraction) results in 8.

Step-by-Step Solution

1
Evaluate the exponent inside the parentheses
42=164^2 = 16
Exponents must be evaluated before basic arithmetic operations inside parentheses.
2
Subtract the numbers within the parentheses
1610=616 - 10 = 6
Operations enclosed in parentheses are prioritized first.
3
Evaluate the absolute value term
2=2|-2| = 2
The absolute value of a negative number is its positive distance from zero.
4
Perform the multiplications from left to right
3×6=183 \times 6 = 18 and 5×2=105 \times 2 = 10
Multiplications are performed before addition and subtraction.
5
Perform the final subtraction
1810=818 - 10 = 8
Subtraction is performed last according to the order of operations.

Key Concept

Order of Operations and Number Properties
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