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Simple formula of rounding of decimals …

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Simple formula of rounding of decimals with their examples
  • 1 answers

Gaurav Seth 3 years, 11 months ago

  • Decide which is the last digit to keep
  • Leave it the same if the next digit is less than 5 (this is called <i>rounding down</i>)
  • But increase it by 1 if the next digit is 5 or more (this is called <i>rounding up</i>)

Example: Round 74 to the nearest 10

  • We want to keep the "7" (it is in the 10s position)
  • The next digit is "4" which is less than 5, so no change is needed to "7"

Answer: 70

(74 gets "rounded down")

Example: Round 86 to the nearest 10

  • We want to keep the "8"
  • The next digit is "6" which is 5 or more, so increase the "8" by 1 to "9"

Answer: 90

(86 gets "rounded up")

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