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6th grade · Math · Unit 11 of 17

Volume & Capacity

Cubes, liters and milliliters

What your child practices

Finding the volume of rectangular prisms, converting between liters and milliliters, and connecting volume to capacity (1 cm³ holds 1 mL).

Oregon State Standards learning standard: 6.GM.A.2 · volume of right rectangular prisms

How we explain it

Children can open this short lesson before they practice.

  1. Volume is the space inside a solid, in cubic units like cm³.
  2. Volume of a rectangular prism = length × width × height.
  3. 1 cm³ holds 1 mL. 1000 mL is 1 L.

Example: A box is 5 cm long, 4 cm wide and 3 cm high. What is its volume? 5 × 4 = 20. 20 × 3 = 60. Answer: 60 cm³

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    A jug holds 1.75 L of lemonade. How many 250 mL glasses can it fill?

    🍋1.75 L

    answer box

  2. Question 2

    Write 1750 mL in liters.

    answer boxL

  3. Question 3

    A rectangular prism is 10 cm long, 3 cm wide and 6 cm high. What is its volume?

    answer boxcm³

  4. Question 4

    A fish tank is 10 cm long, 20 cm wide and 25 cm high. 1 cm³ holds 1 mL. How many liters of water does the full tank hold?

    answer boxL

  5. Question 5

    A box has a volume of 200 cm³. It is 5 cm long and 5 cm wide. How high is it?

    answer boxcm

  6. Question 6

    This is the bottom layer of a box packed with 1 cm cubes. The box is 2 layers high. What is the volume of the box?

    answer boxcm³

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