Which subtraction model (take-away, missing addend, comparison, or measurement) corresponds best to the problem? Ken drove from home to his grandmother's who lives 210 miles away. On the way back home, he drove 82 miles before his car broke down. How far away from home was he? A. Take-away B. Comparison C. Missing addend D. Measurement

This problem fits the take-away model perfectly! Ken starts with a total distance of 210 miles to his grandmother's house and then "takes away" the 82 miles he has already driven on the way back. To find out how far away he is from home, you simply subtract the distance driven from the total distance. It's a classic example of how subtraction can represent a reduction in quantity. If he drove 82 miles before breaking down, it's easy to visualize him subtracting that distance from the originally planned trip. Just think of it as Ken trying to find out how far he still needs to go home after that little roadside adventure. Subtraction in action, indeed!