Elapsed time

​To solve this problem, move the minute hand forward 30 minutes.

​So, in 30 minutes it will be 10:40!

​Let's try another one!
Look at this clock. Right now, the clock shows 9:05. What time was it 15 minutes ago?

​To solve this problem, move the minute hand back 15 minutes. Since the minute hand crosses over the 12, the hour changes too.

​So, 15 minutes ago it was 8:50!

​Elapsed time on the number line

You can also use a number line to solve elapsed time problems. Just make jumps to show the minutes or hours that have passed.
Let's try it!
Maria started reading at 3:30. She read for 1 hour and 15 minutes. At what time did Maria stop reading?
Use a number line and jump ahead to find out. Start at 3:30. Jump ahead 1 hour. Then jump ahead 15 minutes more.

​So, Maria stopped reading at 4:45!

​Let's try another one!

A baker put a cake in the oven at 12:05. He took the cake out at 1:00. How long was the cake in the oven for?

Start at 12:05. Jump ahead 10 minutes to get to 12:15. Then jump ahead 45 minutes to get to 1:00.

​So, the cake was in the oven for 55 minutes!