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Calculate: 20 - 4 × (2 + 1).

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Question: Calculate: 20 - 4 × (2 + 1).

Options:

  1. 8
  2. 12
  3. 16
  4. 10

Correct Answer: 12

Solution: 

First, calculate inside the parentheses: 2 + 1 = 3. Then, 4 × 3 = 12. Finally, 20 - 12 = 8.

Calculate: 20 - 4 × (2 + 1).

Practice Questions

Q1
Calculate: 20 - 4 × (2 + 1).
  1. 8
  2. 12
  3. 16
  4. 10

Questions & Step-by-Step Solutions

Calculate: 20 - 4 × (2 + 1).
  • Step 1: Calculate inside the parentheses: 2 + 1 = 3.
  • Step 2: Multiply 4 by the result from Step 1: 4 × 3 = 12.
  • Step 3: Subtract the result from Step 2 from 20: 20 - 12 = 8.
  • Order of Operations – This question tests the understanding of the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).
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