# Liters and Milliliters (Word Problems)

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Liters and Milliliters (Word Problems)
CCSS.MATH.CONTENT.3.MD.A.2

## In This Liters and Milliliters Video - 3rd Grade

Freddie and Zuri learn to solve word problems using liters and milliliters so they know how much of the ingredients they need to use to perform their science experiment! At the end, there is a big eruption!

## What Are Liters and Milliliters

Liters and Milliliters are metric units of volume. What are liters and milliliters used for measuring? Milliliters are often used for lesser volumes of liquids, and liters are often used for higher volumes of liquids. Things measured in liters and milliliters are items such as a beaker of liquid or a jug of water.

In the above illustration, you can see the definition of milliliters and liters along with some examples of liters and milliliters.

## Solving Word Problems with Liters and Milliliters

The first step to solving word problems is to read the entire problem. Once you have done this, you should then highlight the question, or problem, you are being asked to solve. In the following example, we highlight the last sentence.

The next step is to ask yourself what is the important information that will help me solve the problem, and highlight the important information. For example, in the problem we would highlight both 80 L of white vinegar and share this equally into 2 containers, as these are important to solving the problem.

After this, we need to find the operation. The keyword, share, tells us we are dividing, so we can write this operation below.

Now we can write the number sentence using all the information we have gathered. The number sentence for this word problem is 80 divided by 2 = ? as we know they had 80 L, but want to share this between 2 containers equally.

And finally, we solve the problem, including any units of measurement from the word problem. So, 80 divided by 2 = 40, so Zuri and Freddie will use 40 liters of white vinegar.

## Word Problems with Liters and Milliliters Review

To solve word problems with liters and milliliters, you can follow the following steps:

• Read the word problem and highlight the problem
• Identify the important information
• Identify the operation
• Write the number sentence
• Solve the number sentence, including any units of measurement

Below you will find liters and milliliters worksheets for word problems.

## Liters and Milliliters (Word Problems) exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video Liters and Milliliters (Word Problems).
• ### Magic potions.

Hints

Remember that ml are less than L, so 50 ml is a smaller capacity than 50 L.

Remember that there are 1,000 ml in one liter, so in half a liter there are 500 ml.

Begin by finding the potion bottle that holds the least amount of liquid.

Solution

The bottle with the least amount of liquid only held 30 ml.

The next bottle with slightly more, held $\mathbf{\frac{1}{2}}$ L, which is the same as 500 ml.

The third bottle, when ordered by capacity of liquid, held 820 ml.

The last bottle, holding the most, was the 3 L bottle because this is equivalent to 3,000 ml.

• ### Freddie and Zuri are experimenting.

Hints

Look at the scale on the side of the beaker to see what intervals it is going up by and to read between the lines.

This beaker has water that is half way between 700 ml and 800 ml, so it must be 750 ml.

There are three different liquids that they use, so Freddie and Zuri must add these all together.

Solution
• First we must add the three amounts:
300 ml + 50 ml + 130 ml = 480 ml
• The first beaker has the liquid on the interval above 500 ml. The scale is going up in steps of 100 ml, so the liquid is at 600 ml.
• The second beaker has the liquid exactly in line with 300. So it holds 300 ml.
• The third beaker shows that the liquid is more than 800 ml, but less than 850 ml, so is approximately 820 ml.
• The fourth beaker has the liquid below 500, but above 450, so it is approximately 480 ml. So this is the correct answer.
• ### Party time!

Hints

Decide whether you need to do an addition, a subtraction, a multiplication, or a division problem.

If two guests are sharing a drink, this means they will divide it between the two.

Solution

• Freddie had 2 cups of juice, each cup held 260 ml, in total he drank 520 ml.
2 x 260 = 520

• Zuri poured herself a tall 300 ml glass of juice, but only managed to drink 125 ml. How much was left in her glass? 175 ml.
300 - 125 = 175

• Gus poured himself enough juice to last the whole evening. He poured four 220 ml cups full. In total he had 880 ml.
4 x 220 = 880

• Nia and Nico decided to share a glass of lemonade. They filled the 300 ml glass to the top. They had half each, so each drank 150 ml.
300 $\div$ 2 = 150

• ### Using all four operations to solve capacity problems.

Hints

A tip to divide by 4 is to half and half again.

Try using partitioning when multiplying mentally. Start with multiplying the hundreds, then the tens, then the ones.

Solution
• In the first question there is 360 ml which we need to share equally between 4 glasses. This means that we have to divide.
• 360 ÷ 4 = 90
• In the second question it asks to find how much liquid in total, this means we need to multiply to find 3 times 215.
• 3 x 215 = 645
• In the third question it asks how much is left after the milk spilled out of the carton. This means we need to do subtraction.
• 450 - 75 = 375
• In the last question it asks us to find how much altogether so we need to add the two drinks together.
• 418 + 270 = 688
• ### How much juice is there in total?

Hints

There are two pouches so we need to add together two pouches of 200 ml.

Finding two of something is the same as doubling. Can you double 200?

Solution

As there are two pouches of juice and each pouch holds 200 ml we need to add: 200 + 200 = 400. So the answer is 400 ml.

• ### Making milkshakes.

Hints

If we want the recipe for 12, what do you need to multiply these quantities by?

There are three different liquids that need multiplying on the recipe card.

Can the answer be in liters as well as milliliters? Check whether there are two ways of answering this question.

Solution

As the first recipe card serves 2 and we need to serve 12, we must multiply the ingredients by 6.

• 50 x 6 = 300 ml cream
• 200 x 6 = 1200 ml milk
• 1 x 6 = 6 scoops ice cream
• 10 x 6 = 60 ml chocolate sauce
• We then need to add all the liquid ingredients: 300 + 1200 + 60 = 1560.
• So the total = 1560 ml which is equivalent to 1 liter 560 ml since there 1000 ml in a L.