standard_description: Understand that positive and negative numbers are used together to describe quantities having opposite directions or values (e.g., temperature above/below zero, elevation above/below sea level, credits/debits, positive/negative electric charge); use positive and negative numbers to represent quantities in real-world contexts, explaining the meaning of 0 in each situation.
problem_activity: Watermelon is on sale for $4 per pound.
a.   How much would 5 pounds cost? 7.5 pounds? 12.8 pounds?
b.   Why do you think grocery stores show the price per 1 pound? How is it useful or efficient when determining the cost of differently sized watermelons?


aligns: no