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Convert Units of Time

Students convert between units of time (seconds, minutes, hours, days, weeks, months, years). They apply conversion factors and understand that time units do not follow a consistent base-10 pattern.

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Convert Units of Time

Grade 5 · Measurement Conversions · question 1 of 3

0 of 20

20 rungs. A star at the top.

Finn signs up for swim lessons that last 4 weeks. How many days do the lessons cover?

How it is taught

0:00 of 3:37

Time units do not grow by tens.

Minutes and seconds use 60, not one hundred.

Read it: Find the factor, then convert

1 gallon is 4 quarts, so 2 gallons are 8 quarts and 3 gallons are 12 quarts. The quarts row is the gallons row times 4: 6 gallons are 6 × 4 = 24 quarts.

  1. Find the factor: how many quarts make 1 gallon. Here it is 4.
  2. From a big unit to a small one there are more of them, so multiply by the factor.
  3. From a small unit to a big one there are fewer, so divide: 24 quarts ÷ 4 = 6 gallons.

A gallon holds more than a quart, so it takes 4 quarts to hold as much as 1 gallon.

Each gallon more adds 4 quarts more, so every column of the table is times 4.

Two steps work the same way: 1 gallon is 4 quarts and 1 quart is 4 cups, so 1 gallon is 4 × 4 = 16 cups.

To change to the smaller unit, multiply by the factor; to change to the bigger unit, divide by it.

Adding the factor instead of multiplying, and saying 2 gallons are 2 + 4 = 6 quarts.

Every gallon is 4 quarts, so 2 gallons are 2 × 4 = 8 quarts.

13 days = ___ hours — 312. Every day is 24 hours, so 13 of them is 13 times 24: 312.

3 hours = ? minutes

A movie lasts three hours. How many minutes long is that?

Let's remember a key fact: one hour equals sixty minutes.

So three hours is three groups of sixty minutes each.

To find the total, we multiply three times sixty.

Three times six is eighteen, so three times sixty is one hundred eighty.

A 3-hour movie — how many minutes?1 hour = 60 minutes1 hour1 hour1 hour60 min60 min60 min3 × 60 =1803 × 6 = 18, so 3 × 60 = 180ANSWER180minutes
Grade 5 · Converting hours to minutes

Three hours equals one hundred eighty minutes. Nice work!

What you see

While they climb, your page writes one true line to ask about tonight, and a short note each Sunday.

MayaGrade 3 · Mathematics
Did you know?

A chessboard has 64 squares — share them out between the 8 rows and each row holds exactly 8.

Today’s goal
1 star — one skill mastered, every rung of its ladder climbed
Climbing now
Divide within 100

An example student.

MayaGrade 3 · Mathematics

Maya earned 2 stars this week — Interpret multiplication as equal groups, which took 6 answers over 3 days before its star landed 3 days ago and Multiply by 6, 7, 8 and 9. Next up: Divide within 100.

An example week.

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