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Solve Problems with Mass and Liquid Volume

Students will apply their knowledge of grams, kilograms, and liters to solve one-step word problems involving addition, subtraction, multiplication, and division with mass and liquid volume measurements.

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Solve Problems with Mass and Liquid Volume

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

0 of 12

12 rungs. A star at the top.

12345678LA12345678LB

How many liters do the two jugs hold in all?

Read both jugs.

How it is taught

0:00 of 3:46

Mass and liquid volume are amounts in a story.

Equal groups of liters or grams mean multiply.

Read it: Amounts as jumps

A tank holds 12 L of water. 5 L is used. Start at 12 on the line and jump back 5: it lands on 7 L.

  1. Find the amount you start with: 12 L.
  2. Jump on if some is added, and jump back if some is used.
  3. Read where the jump lands: 12 − 5 = 7 L.

Liters, kilograms and grams can all sit on a number line.

Water poured in moves you on, and water used moves you back.

The unit stays the same, so the answer is in liters too.

Start at the first amount, jump on to add or back to take away, and keep the unit.

Adding 12 and 5 because there are two numbers, and saying 17 L.

The water was used, so it goes down. Jump back 5 from 12: 7 L.

A sack of rice is 15 kg. 8 kg more is added. How many kilograms is it now? — 23. 15 + 8 = 23 kg.

4 bottles × 2 liters each

Liam fills four water bottles for a hike. Each bottle holds two liters. How much water does he carry in all?

We have four equal groups of two liters — that means we can multiply: four times two.

Let's count it up on a number line from zero to ten liters.

Bottle one adds two liters. Hop to two.

Bottle two adds two more. Hop to four.

Bottle three. Hop to six.

Bottle four. Hop all the way to eight.

4 bottles, 2 liters eachHow many liters in all?4×2=?8L4 groups of 2 liters0 L10 L2 LBottle 1 → +2 L4 LBottle 2 → +2 L6 LBottle 3 → +2 L8 LBottle 4 → +2 LTOTAL8 Lof water
Grade 3 · Multiplying liquid volume

So four times two equals eight.

Liam carries eight liters of water in total. 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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