Which sentence describes the expression n − 6 in words?

Class 6AlgebraAlgebra

A6 less than n
Bn less than 6
C6 more than n
D6 times n

Step-by-Step Solution

n − 6 starts at n and takes 6 away, so it reads '6 less than n'. The trap is 'n less than 6' — that would be 6 − n. In a subtraction the order of the two parts changes the answer.

Answer: A) 6 less than n

Key idea: Evaluating an expression

To evaluate an expression, **substitute** a value for the variable and compute. If

x = 5

, then

2 x + 3

becomes

2 \times 5 + 3 = 10 + 3 = 13

. The same expression with

x = 0

gives

2 \times 0 + 3 = 3

. Practise substituting — it is the bridge between an algebraic expression and a real number.

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