Sarah needs to solve this word problem: A sweater in a store is originally priced at $40, but the price tag is marked "One-half off." The sweater is placed on a rack marked "Five dollars off the sale price." How much does the sweater cost now?
Sarah knows how to find one-half of a number; she also knows how to subtract one number from another. She uses both of these operations to arrive at the correct answer of $15. Which one of the following best describes Sarah's approach to problem solving?
A) drawing an analogy
B) availability
C) working backward
D) combining algorithms

Question

Quizplus · Accepted Answer

Sarah used two different algorithms, finding one-half of a number and subtracting one number from another, and combined them to solve the problem. This aligns with the strategy of combining algorithms in problem solving.

Sarah Needs to Solve This Word Problem: a Sweater in a Store