Question: 18 Complete these steps for each calculation. i Work out an estimate of the answer by rounding each number to one significant figure. ii Use

18 Complete these steps for each calculation. i Work out an estimate of the answer by rounding each number to one significant figure. ii Use a calculator to work out the accurate answer. Give this answer correct to three significant figures (3 s.f.). iii Compare your estimate with the accurate answer to decide if your accurate answer is correct.

a 0.6292 x 189.3 b 782.5+1.95 C 21.4590 d 0.7951x206 9732-3176 e f 1.96 6.816 48.22+9.81 20.05 158.2 g h 2.10411.795 78 5000.02 i 0.1956x43.5 7.887-3.109 0.235x388

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