Mathematics for IGCSE & O level - Using A Calculator (Section 2 - No. 18)
To check the result, the user needs to use which of the following?
The answer should be close to the estimated answer.
A different solution.
You need to use the estimated answer.
Use the same method.
Обяснение
To ensure that your solution is correct, you must use the estimated result, or use a different solution.