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level: Apply and interpret upper and lower bounds

Questions and Answers List

Question	Answer
If a value is rounded, its upper or lower bound as appropriate should be used when finding the _______ or ________ possible answers to a calculation.	largest, smallest
A bag of flour has a mass of 1500 g (to the nearest 10 g). Find the upper bound for the mass of 10 bags of flour.	15050g
Jack is 1.8 m tall (rounded to the nearest 10 cm). Ella is 1.63 m tall (rounded to the nearest cm). What is the smallest possible difference in their heights?	11.5cm
A piece of A4 paper is 21.1 cm by 29.7 cm measured to the nearest 0.1 cm. What are the lower and upper bounds of its area, in square centimetres, to 1 dp?	624.1cm squared to
A piece of A4 paper is 21.1 cm by 29.7 cm measured to the nearest 0.1 cm. What are the lower and upper bounds of its area, in square centimetres, to 1 dp?	624.1cm squared to 629.2cm squared