Work out 9.8 + 6.8 and 4.2 × 2.1. Give your answer as a decimal. Write down all the figures on your calculator display. Write your answer to part (a) correct to 2 decimal places.
Understand the Problem
The question is asking to perform a calculation involving addition (9.8 + 6.8) and multiplication (4.2 × 2.1), then provide the results as decimal figures. The user needs to display all figures from the calculator for part (a) and round the answer for part (b) to two decimal places.
Answer
The answer is approximately $1.88$.
Answer for screen readers
The result of the calculation is approximately $1.88$.
Steps to Solve
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Perform the Addition First, add the two numbers in the first part of the expression: [ 9.8 + 6.8 = 16.6 ]
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Perform the Multiplication Next, multiply the two numbers in the second part of the expression: [ 4.2 \times 2.1 = 8.82 ]
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Combine the Results Now, divide the result of the addition by the result of the multiplication: [ \frac{16.6}{8.82} \approx 1.88 ]
The result of the calculation is approximately $1.88$.
More Information
This result gives a decimal figure that combines both addition and multiplication. The final answer is rounded to two decimal places, as requested in part (b).
Tips
- Confusing the order of operations; remember to perform addition and multiplication separately before combining.
- Incorrectly rounding the final answer; ensure you're rounding to two decimal places only at the end.
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