Chapter 1: Q6. (page 3)

Find each sum or difference.
$18.4 - (- 3.2)$

Short Answer

Expert verified

The value of the expression is 21.6.

Step by step solution

Step 1. Concept of addition and subtraction.

Two numbers with similar signs get added and the resulting number carries the similar sign.

Two numbers with opposite signs get subtracted and the resulting number carries the sign of the larger number.

Step 2. Apply the concept of like and unlike signs.

If there is a sign like $+ (+)$ or $- (-)$ then the resulting sign will be positive and if there is an unlike sign $+ (-)$ or $- (+)$ then the resulting will be negative.

So, using these rules, the given expression can be written as.

$\begin{array}{l} = 18.4 - (- 3.2) \\ = 18.4 + 3.2 \end{array}$

Step 3. Evaluate the sum.

To evaluate the sum $18.4 + 3.2$ , write the numbers vertically with aligned decimal and add them as shown below:

$\begin{array}{l} \underline{\begin{array}{l} 18.4 \\ + 3.2 \end{array}} \\ 21.6 \end{array}$

Therefore, the sum is 21.6.

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Find each sum or difference.
$18.4 - (- 3.2)$

Short Answer

Step by step solution

Step 1. Concept of addition and subtraction.

Step 2. Apply the concept of like and unlike signs.

Step 3. Evaluate the sum.

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Find each sum or difference.18.4−−3.2

Short Answer

Step by step solution

Step 1. Concept of addition and subtraction.

Step 2. Apply the concept of like and unlike signs.

Step 3. Evaluate the sum.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Discrete Mathematics

Decision Maths

Probability and Statistics

Applied Mathematics

Mechanics Maths

Calculus

Study anywhere. Anytime. Across all devices.

Find each sum or difference.
$18.4 - (- 3.2)$