ariihardwickah ariihardwickah
  • 14-04-2018
  • Mathematics
contestada

estimate the quotient. Explain how u got your answer 77.5÷10.2

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mathmate
mathmate mathmate
  • 14-04-2018
Divide 77.5 by 10 = 7.75
Since we divide by 10.2 (and not 10), we **subtract** 2% of 7.75, which is about 0.155 to give 7.595.  (error=-0.04%)

You can also simplify a little by approximating 2% of 7.75 as 0.15 to give 7.6 as your estimate. (error=+0.026%)

exact value = 7.598...
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