Chapter 2: Q77. (page 67)

Find the reciprocal of each number.
$2.5$

Short Answer

Expert verified

The reciprocal of the $2.5$ is $0.4$ .

Step by step solution

Step 1- Given information

We have, a number $2.5$ .

To find the reciprocal of the given number.

Step 2- concept used

When we multiply by $x$ with the reciprocal or multiplicative inverse of a number $x$ is the number gives $1$ .

Such that $x \times \frac{1}{x} = 1$

Thus, $x$ is the reciprocal of $\frac{1}{x}$ and $\frac{1}{x}$ is the reciprocal of $x$ .

Step 3- To find the reciprocal

Let the reciprocal of the given number $2.5$ is $= x .$

So,

$\begin{array}{l} 2.5 \times x = 1 \\ \Rightarrow \frac{25}{10} \times x = 1 \\ \Rightarrow \frac{5}{2} \times x = 1 \\ \Rightarrow x = \frac{2}{5} \\ \Rightarrow x = 0.4 \end{array}$

Hence, the reciprocal of the $2.5$ is $0.4$ .

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Column A	Column B
the average (arithmetic mean) of three integers x, y, z and 29	30

Find the reciprocal of each number.
$2.5$

Short Answer

Step by step solution

Step 1- Given information

Step 2- concept used

Step 3- To find the reciprocal

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Find the reciprocal of each number.2.5

Short Answer

Step by step solution

Step 1- Given information

Step 2- concept used

Step 3- To find the reciprocal

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Decision Maths

Probability and Statistics

Calculus

Statistics

Mechanics Maths

Pure Maths

Study anywhere. Anytime. Across all devices.

Find the reciprocal of each number.
$2.5$