Chapter 1: Q18. (page 36)

Find the difference.
$- 20 - 4$

Short Answer

Expert verified

The difference of the numbers is $- 24$ .

Step by step solution

Step-1 – Apply the concept of subtraction

To add two numbers with similar signs, add their absolute values and keep the similar sign with the resulting number.

To add two numbers with opposite signs, subtract the absolute value of smaller number from absolute value of larger number and keep the sign of larger number with the resulting number.

Step-2 – Example for subtraction of numbers

The difference of the numbers $7 - 3 = 4$ is positive because the larger number is positive.

And the difference of the numbers $3 - 7 = - 4$ is negative because the larger number is negative.

Step-3 – Evaluate the difference

To evaluate the difference $- 20 - 4$ , add the opposite of the second number.

To subtract $4$ , add its opposite $- 4$ to get

\begin{matrix} - 20 - 4 = - 20 + (- 4) \\ = - 24 \end{matrix}

Thus, the difference of the numbers is $- 24$ .

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Find the difference.
$- 20 - 4$

Short Answer

Step by step solution

Step-1 – Apply the concept of subtraction

Step-2 – Example for subtraction of numbers

Step-3 – Evaluate the difference

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Find the difference.-20-4

Short Answer

Step by step solution

Step-1 – Apply the concept of subtraction

Step-2 – Example for subtraction of numbers

Step-3 – Evaluate the difference

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Discrete Mathematics

Theoretical and Mathematical Physics

Geometry

Mechanics Maths

Logic and Functions

Decision Maths

Study anywhere. Anytime. Across all devices.

Find the difference.
$- 20 - 4$