Back to: MATHEMATICS JSS1
Welcome to class!
In today’s class, we will be talking more about approximation. Enjoy the class!
APPROXIMATION
- Approximating values of addition, subtraction, multiplication and division
- Exercise on the degree of accuracy round up numbers
- Problems solving on quantitative reasoning and approximating things in everyday activities
When adding or subtracting approximate numbers, the result should have the precision of the least precise number.
Example: When adding 2.3, 5.704 and 12.67, our final answer should be correct to one decimal place.
2.3 + 5.704 + 12.67 = 20.674 ≈ 20.7
Accuracy when multiplying or dividing
When multiplying or dividing approximate numbers, the result should have the accuracy of the least accurate number.
Example: When multiplying 3.564 and 2.37, our final answer should have three significant digits.
3.564 × 2.37 = 8.44668 ≈ 8.45
Accuracy when finding the square root
When finding the square root of a number, the result has the same accuracy as the number.
Example: √22.97 should be written correctly to 4 significant digits:
√22.97 ≈ 4.793
Both numbers have the same accuracy.
In our next class, we will be talking about Number Bases. We hope you enjoyed the class.
Should you have any further question, feel free to ask in the comment section below and trust us to respond as soon as possible.