Finding Elapsed Time

Finding Elapsed Time
Introduction

Finding elapsed time means determining how much time passes between a start time and an end time. This skill helps students understand schedules, plan activities, and measure how l...

Jason starts playing a video game at 1:45 p.m. and stops at 4:10 p.m. He wants to know how much time he spent playing. To find this, he has to subtract 1:45 from 4:10.

Since 10 minutes is less than 45 minutes, we cannot subtract the minutes yet. We regroup by taking 1 hour from 4 hours. That leaves 3 hours. Since 1 hour equals 60 minutes, ...