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Understand and Measure Liquid Volume in Liters

Students will learn that liquid volume measures how much a container holds, using liters (l) as the standard unit. They will practice reading graduated cylinders or beakers and estimating liquid volumes of containers using liters as a benchmark.

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Understand and Measure Liquid Volume in Liters

Grade 3 · Liquid Volume & Mass Measurement · question 1 of 3

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12 rungs. A star at the top.

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Read the jug in liters.

Read the jug.

How it is taught

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Liquid volume is how much liquid a container holds.

We measure that amount in liters.

A liter is written with a capital L.

Read it: Read each jug, then add

You have a jug of 3 liters and a jug of 4 liters. Guessing the total is easy to get wrong. Look at the water in each jug, then put them together.

  1. Read the first jug: 3 liters.
  2. Read the second jug: 4 liters.
  3. Pour them together: 3 + 4 = 7 liters.

Each jug has its own scale, so read the number at the top of the water.

Each jug already has a reading, so you only add those two numbers.

3 liters plus 4 liters is 7, which you can see when the water sits in one jug.

Read how much is in each jug, then add the two amounts.

Reading the empty space above the water, and saying jug A holds 5 liters when the water is at 3.

Read the number at the top of the water. 3 liters and 4 liters make 7.

Jug A shows 11 liters. Jug B shows 6 liters. How many liters in all? — 17. Read each jug, then add: 11 + 6 = 17 liters.

Reading a beaker filled to 3 L

Have you ever poured juice into a cup? The amount of liquid that fits inside is called liquid volume.

We measure liquid volume in liters. We write a liter with a capital L.

Here is a beaker — a special cup with measuring marks on the side.

Each line on the side shows one more liter: one, two, three, four, five.

Now let's pour some water into the beaker.

To read the volume, look at the top of the water. Which mark does it line up with?

Let's count up: one liter, two liters, three liters!

How much liquid fits inside?That's liquid volume.We measure in litersL= one literHow many liters?1 L2 L3 L4 L5 Lpour!1233 L ≈3 big waterbottlesVOLUME3 Lthree liters
Grade 3 · Measuring liquid in liters

Three liters is about three big water bottles. That's a lot of water!

We measured the liquid volume. The beaker holds three liters!

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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