Question

You pack sandwiches for a mountain hike with your friends. Each sandwich takes 2 slices of bread and each hiker eats one sandwich. How many slices of bread are used for m hikers?

Answer 1

2m

Explanation:

(2 slices/sandwich) × (1 sandwich/hiker) × (m hikers) = 2m slices

_____

"Unit analysis" can be helpful keeping the numbers straight.