Calculate: How Many 3cm Cubes Fit Inside a 6cm Cube?

Volume Calculations with Cubic Units

How many cubes with sides that equal 3 cm fit into a large cube with sides measuring 6 cm?

666

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 How many small cubes will fit in the large cube?
00:04 Let's draw the number of cubes
00:14 Let's count the cubes
00:36 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

How many cubes with sides that equal 3 cm fit into a large cube with sides measuring 6 cm?

666

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Determine how many smaller cubes (3 cm) fit along one side of the larger cube (6 cm).
  • Step 2: Use the result from Step 1 to find out how many smaller cubes fit within the entire larger cube.

Now, let's work through each step:

Step 1: Calculate how many 3 cm cubes fit along one side of the 6 cm cube.
Since each side of the larger cube is 6 cm long, we divide this length by the side length of the smaller cube:

6 cm3 cm=2\frac{6 \text{ cm}}{3 \text{ cm}} = 2

This result means that 2 smaller cubes can fit along one side of the larger cube.

Step 2: Calculate the total number of smaller cubes that fit inside the larger cube.
Since cubes fit along the length, width, and height, the total number of 3 cm cubes is:

2×2×2=82 \times 2 \times 2 = 8

Therefore, the solution to the problem is 8\textbf{8}.

3

Final Answer

8

Key Points to Remember

Essential concepts to master this topic
  • Rule: Divide each dimension to find cubes per side
  • Technique: Use 63=2 \frac{6}{3} = 2 cubes along each dimension
  • Check: Count 2×2×2 = 8 total cubes in 3D arrangement ✓

Common Mistakes

Avoid these frequent errors
  • Adding dimensions instead of multiplying
    Don't calculate 2+2+2 = 6 cubes! This only counts one row, not the entire 3D space. Always multiply all three dimensions: 2×2×2 = 8 cubes to fill the complete volume.

Practice Quiz

Test your knowledge with interactive questions

Identify the correct 2D pattern of the given cuboid:

444444999

FAQ

Everything you need to know about this question

Why do I multiply 2×2×2 instead of just 2×2?

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Because cubes are three-dimensional! You need to stack layers on top of each other. The first 2×2 gives you one layer of 4 cubes, then multiply by 2 again for the second layer above it.

Can I just divide the volumes instead?

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Yes! 6333=21627=8 \frac{6^3}{3^3} = \frac{216}{27} = 8 works too. But understanding the dimensional approach helps you visualize how cubes actually fit together in space.

What if the dimensions don't divide evenly?

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Then some smaller cubes won't fit! For example, a 7cm cube can only fit 2 complete 3cm cubes along each side, with 1cm leftover space.

How can I visualize this problem better?

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Think of it like stacking blocks! Make a 2×2 square on the bottom (4 cubes), then place another identical 2×2 layer on top. That's your 8 cubes total.

Is there a formula for this type of problem?

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Yes! For any cubes: (large sidesmall side)3 \left(\frac{\text{large side}}{\text{small side}}\right)^3 . The exponent 3 represents the three dimensions of a cube.

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