GB-03-03-001 · Estimating a calculation

Estimate the value of $\frac{78.9\times 1.88}{4.92}$ . Round each number to 1 significant figure first.

Estimating Calculations (Round to 1 s.f.) Application of related method — Booklet p. 39

Method

1) Round every number in the calculation to 1 significant figure first

2) Perform the simplified calculation

Worked Example (GB-03-03-001)

Use 80, 2 and 5.

32

Ans =

32