ECZ 2020 · GCE Paper 1 — Approximations

The values of x and y are given to 1 decimal place as x = 4.2 and y = 7.3. Find the (b) minimum value of x - y.

Verified working — step 1

Minimum x - y = lower limit of x - upper limit of y

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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