7-3 number stories with measures

Sanjay catches the bus at 2:05 PM. It takes him 40 minutes to get to hockey practice. Practice starts at 2:30 PM. How many minutes late will Sanjay be to practice?

Make sense of the problem

Make a plan

Solve the problem

Check

First, we need to make sense of the problem, we know that a sip of water is about 10 mL and we want to find out the number of sips it would take to drink 130 mL.

Next, make a plan. What do you have to do to find the number of sips it will take to drink 130 mL?

You might have said,
Count by 10s until you reach 130
Reason about the number of groups of 10 in 100.
Think of a related multiplication problem. 

Use your favorite strategy to solve the problem.

The final step in the guide to solving number stories is to check your answer.

You could try a different strategy to see if you get the same answer.

Ask yourself does your answer make sense? How do you know?

A runner takes larger sips after a race. She drinks about 20 mL per sip. How many sips does she take to drink the 180 mL in her water bottle?