Question

Harry and Terry are each told to calculate $8-(2+5).$ Harry gets the correct answer. Terry ignores the parentheses and calculates $8-2+5.$ If Harry's answer is $H$ and Terry’s answer is $T,$ what is $H-T?$

$-10$

$-6$

$0$

$6$

$10$

Answer: A

Concepts:order of operations

Difficulty rating: 370

Solution:

Harry calculates it correctly as follows: $\begin{align*} 8 - (2 + 5) &= 8 - 7 \\ &= 1. \end{align*}$ Terry calculates it incorrectly as follows: $\begin{align*} 8 - 2 + 5 &= 6 + 5 \\ &= 11. \end{align*}$ Therefore: $\begin{align*} H - T &= 1 - 11 \\ &= -10. \end{align*}$

Thus, A is the correct answer.

2014 AMC 8 Problem 1

Answer: A

Difficulty rating: 370

Solution:

Problem 1 in Other Years