Upper and Lower bounds : work out before multiplying?

  • Thread starter Thread starter Lucy B
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Lucy B

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I mean if you have a question such as the width of a box is 20cm to the nearest cm. What is the upper bound of the length if six are placed side by side?

I.e. would you work out the upper and lower bounds of 20cm
OR work out 20 x 6 and then the upper/lower bounds of that?

Thanks :)
 
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