b). Shelly has 6,782,344 mm of rope. She has another rope of length 2,539,886 mm. If
both the ropes are attached, the estimated length nearest to 1000 will be
(i) 9,450,000
(ii) 9,322,000
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To estimate sum and difference, we first round off each number to the nearest tens, hundreds, thousands or millions and then apply the required mathematical operation.
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