s

2.5 Explain, with illustrations, how you would use rounding off and compensation as calculation

techniques to judge the reasonableness of solutions. Give one example in each case.

(Guidelines: Use addition of four 3-digit numbers as an example; simplify the problem

using any method; judge the reasonableness of the answer using (i) rounding off and

(ii)compensation techniques) (Refer to mathematics CAPS document on page 132 for more

information)

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