Topic Content:
- Approximation Involving the Four Basic Operations
Addition:
Worked Example 12.6.1:
What is the approximated answer to each of the following addition problems?
i. 708 + 194
ii. 57.6 + 83.9
Solution
Round each number to 1 s.f or to the nearest 100. We have
i. 708 + 194 ≈ 700 + 200 = 900
ii. 57.6 + 83.9 ≈ 60 + 80 = 140
Subtraction:
Worked Example 12.6.2:
Round off each number to 1 s.f.
i. 3072 – 1365
ii. 595.845 – 96.869
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