Question

An octopus has $8$ arms. At the aquarium there are $3$ octopuses in one tank. How many arms do the three octopuses have all together?

Answer 1

Hint: To solve the above question we will use the basic operations of mathematics. In mathematics, there are four basics which we usually use to solve the problems of mathematics. Addition, subtraction, multiplication, or division are the four basic operations of mathematics. Here we are going to use a multiplication operation to solve the above question. Multiplication of whole numbers may be thought of as a repeated addition. The multiplication of two numbers is equivalent to adding as many copies of one of them. The result of multiplication operation is called a product.

Complete step-by-step solution:
We have been given that, we have $3$ octopus and each octopus has $8$ arms. Before solving this question with the multiplication we should know the table of either $8$ or $3$. Then easily we can reach the answer.
Here, the number of octopus is $3$
And number of arms each octopus has $8$
Then, the total number of arms becomes= number of octopus multiplied with number of arms of each octopus. That is
 Let $y$ be the total number of arms then,
$\Rightarrow y=$ Numbers of octopus $\times $ Numbers of arms of each octopus.
$\Rightarrow y=3\times 8$
$\Rightarrow y=24$
Hence, with all together the numbers of arms of octopus are $24$.

Note: We can also solve the above question by using addition operation; it means we have to add the arms of octopus one by one
Now,
First octopus has $8$ arms, second octopus has also $8$ arms and third octopus has also $8$ arms. Now adding them all together, we get
Let $y$ be the total numbers of arms, then
$\begin {align}
  & \Rightarrow y=8+8+8 \\
 & \Rightarrow y=16+8 \\
 & \Rightarrow y=24 \\
\end{align}$
Hence we got the answer $24$, octopus have $24$ arms with all together.