Last updated on June 3rd, 2025
When a number is multiplied by itself thrice, the resultant number is called the cube of a number. Cubing is used when comparing sizes of objects or things with cubic measurements. In this topic, we shall learn about the cube of 120.
A cube number is a value obtained by raising a number to the power of 3, or by multiplying the number by itself three times.
When you cube a positive number, the result is always positive.
When you cube a negative number, the result is always negative.
This is because a negative number multiplied by itself three times results in a negative number.
The cube of 120 can be written as 120³, which is the exponential form.
Or it can also be written in arithmetic form as 120 × 120 × 120.
In order to check whether a number is a cube number or not, we can use the following three methods, such as the multiplication method, a factor formula (a³), or by using a calculator. These three methods will help kids to cube the numbers faster and easier without feeling confused or stuck while evaluating the answers.
The multiplication method is a process in mathematics used to find the product of two numbers or quantities by combining them through repeated addition. It is a fundamental operation that forms the basis for more complex mathematical concepts.
Step 1: Write down the cube of the given number. 120³ = 120 × 120 × 120
Step 2: You get 1,728,000 as the answer. Hence, the cube of 120 is 1,728,000.
The formula (a + b)³ is a binomial formula for finding the cube of a number. The formula is expanded as a³ + 3a²b + 3ab² + b³.
Step 1: Split the number 120 into two parts. Let a = 100 and b = 20, so a + b = 120
Step 2: Now, apply the formula (a + b)³ = a³ + 3a²b + 3ab² + b³
Step 3: Calculate each term a³ = 100³ 3a²b = 3 × 100² × 20 3ab² = 3 × 100 × 20² b³ = 20³
Step 4: Add all the terms together: (a + b)³ = a³ + 3a²b + 3ab² + b³ (100 + 20)³ = 100³ + 3 × 100² × 20 + 3 × 100 × 20² + 20³ 120³ = 1,000,000 + 600,000 + 120,000 + 8,000 120³ = 1,728,000
Step 5: Hence, the cube of 120 is 1,728,000.
To find the cube of 120 using a calculator, input the number 120 and use the cube function (if available) or multiply 120 × 120 × 120. This operation calculates the value of 120³, resulting in 1,728,000. It’s a quick way to determine the cube without manual computation.
Step 1: Ensure the calculator is functioning properly.
Step 2: Press 1 followed by 2 and 0
Step 3: If the calculator has a cube function, press it to calculate 120³.
Step 4: If there is no cube function on the calculator, simply multiply 120 three times manually.
Step 5: The calculator will display 1,728,000.
There are some typical errors that kids might make during the process of cubing a number. Let us take a look at five of the major mistakes that kids might make:
What is the cube and cube root of 120?
The cube of 120 is 1,728,000 and the cube root of 120 is approximately 4.932.
First, let’s find the cube of 120.
We know that the cube of a number, such that x³ = y
Where x is the given number, and y is the cubed value of that number
So, we get 120³ = 1,728,000 Next, we must find the cube root of 120
We know that the cube root of a number ‘x’, such that ∛x = y
Where ‘x’ is the given number, and y is the cube root value of the number
So, we get ∛120 ≈ 4.932
Hence the cube of 120 is 1,728,000 and the cube root of 120 is approximately 4.932.
If the side length of the cube is 120 cm, what is the volume?
The volume is 1,728,000 cm³.
Use the volume formula for a cube V = Side³.
Substitute 120 for the side length: V = 120³ = 1,728,000 cm³.
How much larger is 120³ than 110³?
120³ – 110³ = 505,720.
First, find the cube of 120³, that is 1,728,000
Next, find the cube of 110³, which is 1,222,280
Now, find the difference between them using the subtraction method. 1,728,000 – 1,222,280 = 505,720
Therefore, 120³ is 505,720 larger than 110³.
If a cube with a side length of 120 cm is compared to a cube with a side length of 30 cm, how much larger is the volume of the larger cube?
The volume of the cube with a side length of 120 cm is 1,728,000 cm³
To find its volume, we multiply the side length by itself three times (since it’s a 3-dimensional object).
Cubing 120 means multiplying 120 by itself three times: 120 × 120 = 14,400, and then 14,400 × 120 = 1,728,000.
The unit of volume is cubic centimeters (cm³), because we are calculating the space inside the cube.
Therefore, the volume of the cube is 1,728,000 cm³.
Estimate the cube of 119.9 using the cube of 120.
The cube of 119.9 is approximately 1,728,000.
First, identify the cube of 120, The cube of 120 is 120³ = 1,728,000.
Since 119.9 is only a tiny bit less than 120, the cube of 119.9 will be almost the same as the cube of 120.
The cube of 119.9 is approximately 1,728,000 because the difference between 119.9 and 120 is very small.
So, we can approximate the value as 1,728,000.
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
: He loves to play the quiz with kids through algebra to make kids love it.