Chapter 1: Q2A. (page 10)

Evaluate the expression $3 + 42 \cdot 2 - 5$ .

Short Answer

Expert verified

The simplification expression of $3 + 42 \cdot 2 - 5$ is 82.

Step by step solution

Step 1. Apply the BODMAS rule.

According to the BODMAS rule of simplification, at first, the multiplication operation must be completed followed by addition and then subtraction.

Step 2. Example of applying BODMAS rule.

The expression $2 - 5 \cdot 2 + 20$ can be written as

$\begin{array}{l} 2 - 5 \cdot 2 + 20 = 2 - (5 \times 2) + 20 \\ = 2 - 10 + 20 \\ = (2 + 20) - 10 \\ = 22 - 10 \\ = 12 \end{array}$

Step 3. DESCRIPTION OF STEP.

The expression $3 + 42 \cdot 2 - 5$ can be simplified as follows:

$\begin{array}{l} 3 + 42 \cdot 2 - 5 \\ = 3 + (42 \times 2) - 5 \\ = 3 + 84 - 5 \\ = 87 - 5 \\ = 82 \end{array}$

Hence, the simplified expression of $3 + 42 \cdot 2 - 5$ is 82.

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Evaluate the expression $3 + 42 \cdot 2 - 5$ .

Short Answer

Step by step solution

Step 1. Apply the BODMAS rule.

Step 2. Example of applying BODMAS rule.

Step 3. DESCRIPTION OF STEP.

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Evaluate the expression 3+42⋅2−5.

Short Answer

Step by step solution

Step 1. Apply the BODMAS rule.

Step 2. Example of applying BODMAS rule.

Step 3. DESCRIPTION OF STEP.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Calculus

Decision Maths

Logic and Functions

Pure Maths

Applied Mathematics

Mechanics Maths

Study anywhere. Anytime. Across all devices.

Evaluate the expression $3 + 42 \cdot 2 - 5$ .