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## 4th grade

### Course: 4th grade > Unit 14

Lesson 1: Estimating mass# Units of measurement: FAQ

Frequently asked questions about units of measurement.

## Why do we need to learn how to estimate mass, volume, and length?

Estimating measurements is a valuable skill in many everyday situations. For example, when you're cooking, you might need to eyeball how much of an ingredient to add. Or when you're packing for a trip, you might need to guess how much your suitcase weighs so you don't go over the airline's weight limit.

Try it yourself with these exercises:

## What are some of the main forms of measurement?

We can categorize measurement into three categories:

**Weight/mass**: grams, kilograms, ounces, pounds**Volume**: milliliters, liters, cups, pints, quarts, gallons**Length/distance**: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles

## How do we convert between different units of measurement?

There are formulas you can use to convert between different units of measurement. For example, to convert kilograms to grams, you multiply the number of kilograms by 1, comma, 000. To convert pounds to ounces, you multiply the number of pounds by 16.

Conversions | |||||
---|---|---|---|---|---|

1 kilometer equals, 1, comma, 000 meters | 1 minute equals, 60 seconds | 1 literequals, 1, comma, 000 milliliters | |||

1 meter equals, 100 centimeter | 1 hour equals, 60 minutes | 1 kilogram equals, 1, comma, 000 grams | |||

1 meter equals, 1, comma, 000 millimeters | 1 gram equals, 1, comma, 000 milligrams | ||||

1 centimeter equals, 10 millimeters |

Try it yourself with these exercises:

## How do we use these skills in the real world?

There are countless ways we use these skills in the real world! We use measurement to cook, build, and design things. We use time-telling skills to keep ourselves on schedule, and we use currency conversion skills when we travel to different countries.

## Want to join the conversation?

- what is a measurement

PS. I'm asking for my mom(8 votes)- In math, by measure, we mean quantifying the length, weight, capacity (volume), and many more quantities. Measurement of any quantity is expressed in 2 parts— a numeric value and the specific unit. The following are the most measured quantities: Length. Weight.(6 votes)

- I'm confused I can't figure this out can someone help me?

Please & Thank you!(9 votes)- yes, I can I'm in the 9th grade.(2 votes)

- is a digital clock more popular than a analog clock(7 votes)
- depends on who you ask.(5 votes)

- Hello i am writing this because idk w else to do and am so bored so hi everyone idk how to do this ether so ya this also in not helping me to be more smart im still clueless!BYE...(6 votes)
- ohh me oh my i am bnot so smart(5 votes)

- soo much drama in these comments(6 votes)
- I agree 100% !(4 votes)

- hey khan users, I am writing this comment because I have absolutely nothing to do and I would like to pass time. I honestly don't understand this app and im probably the only one but I think this website is not helping me at all. I don't get it when teachers say that this is going to help me.. is this just me?(6 votes)
- how do you do area and perimeter?(5 votes)
- so area is the inside so you do like
*x_=*but in 2 sides are one length and the other 2 are another length so you add for exaple*+_=*(3 votes)