Find how long, or when it ends
Being able to work out elapsed time, the minutes that pass between two moments, helps your child plan ahead and make sense of a wait, like how long until dinner. It also stretches their adding and subtracting, because an hour holds 60 minutes, not 100. In 4th grade, this grows into problems with hours and minutes together. It shows up in bus schedules, cooking times, and how long is left in a game.
In this video, your child will learn to find how much time has passed.
The lesson stops at each question for your child's answer.
Three problems, each a little harder
Each problem is worked step by step. Your child will solve the last one before Bobby shows how.
Example 1
3:10 to 3:35. How many minutes?
Example 2
4:45, 35 minutes later. What time is it?
Your child's turn
9:35 to 10:22. How many minutes?
The three key steps
- 1Start time on a clock
- 2Count 5s, then 1s
- 3Read the minutes or end time
Mistakes to listen for
- Adding times as if an hour had 100 minutes, so 3:45 plus 25 minutes becomes 3:70 instead of 4:10.
- Subtracting the clock numbers directly, so the time from 2:50 to 3:15 comes out as 65 minutes instead of 25.
- Adding instead of subtracting to find a start time, so lunch that ended at 12:20 after 35 minutes seems to have started at 12:55.
The lesson shows every step, so your child sees why it works. Read our parent's guide to working out how many minutes have passed →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
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More 3rd grade Measurement & Data, with questions your child answers along the way.
Questions parents ask
Does my child need an account to watch?
No. You can watch this on any device at any time. If your child would like to practice working out how many minutes have passed, and you'd like parent-friendly reports on your child's progress and growth, you can join Bobby's Math Club for unlimited free practice.
What happens when my child answers a question?
A right answer gets a cheer, and the lesson carries on. If your child isn't sure, they can tap "I don't know yet", and Bobby gives the answer and shows another example. Nothing is scored or stored.
Is this the same lesson that's on YouTube?
Yes. Here, the lesson stops at each question and waits for your child to answer. On YouTube, each question stays on screen for a few seconds, and then the lesson plays on.
Where can I learn more?
There's a short, kid-friendly lesson like this one for every Pre-K to 5th grade math skill, all in our video library. Our parent's guide to working out how many minutes have passed has more on where kids get stuck and how you can help at home. In the club, your child practices at just the right level, about five minutes a day, and you get parent-friendly reports as they grow. Learn more about how it works →
Practice working out how many minutes have passed
Questions at your child's level, about five minutes a day, on working out how many minutes have passed and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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