Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 24)
What is the lower bound of the difference between the widths of two kitchen cupboards, one with a width of 300 mm and the other with a width of 500 mm, both to the nearest millimetre?
199 mm
199.5 mm
200 mm
200.5 mm
Explanation
To find the lower bound of a difference, subtract the upper bound of the smaller value from the lower bound of the larger value. The smaller width is 300mm (299.5) and the larger width is 500mm (500.5). Therefore the lower bound of the difference is 499.5-300.5=199mm
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