Question

Give a rough estimate (by rounding off to nearest hundreds)and also a closer estimate (by rounding off to nearest tens):439+334+4317

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Answer 1

According to the question,

Given that,

439+334+4317=5090

=>so,by rounding of 5090 nearest hundred

we will get 5100( because as we know that if the nos tenth place is greater than or equal to 50 than the digit in the hundred place will be the next digit of the given number.Here 90>50 ,so we round of 5090 as 5100)

=> By rounding of 5090 to nearest 10

we will get the same no that is 5090(because as per the rule if the digit in the ones place is more than or equal to 5 than the no.in tenth place will be the next no.of the given no..Here 0<5 ,so the no remain same i.e. 5090.