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What does estimate the sum by first rounding to the nearest whole number?
Wiki User
∙ 10y ago
A mathematician in a hurry or one who is only interested in an approximate answer does it.
Wiki User
∙ 10y ago
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What are the rules to Estimating products and quotients of mixed numbers?
Estimating sumsUse rounded numbers to estimate sums.Example 1Give an estimate for the sum of 19.61 and 5.07 by rounding to the nearest tenth.Round each number to the nearest tenth.Example 2Estimate the sum of 19.61 + 5.07 by rounding to the nearest whole number.Round each number to a whole number.Estimating differencesUse rounded numbers to estimate differences.Example 3Give an estimate for the difference of 12.356 - 5.281 by rounding to the nearest whole number.Round each number to the nearest whole number.Now subtract.So 12.356 - 5.281 ≈ 7.Estimating productsUse rounded numbers to estimate products.Example 4Estimate the product of 4.7 × 5.9 by rounding to the nearest whole number.Round each number to a whole number.So 4.7 × 5.9 ≈ 30.Again, in decimals, as in whole numbers, if both multipliers end in .5, or are halfway numbers, rounding one number up and one number down will give you a better estimate of the product.Example 5Estimate the product of 7.5 × 8.5 by rounding to the nearest whole number.You can also round the first number down and the second number up and get this estimate.In either case, your approximation will be closer than it would be if you rounded both numbers up, which is the standard rule.Estimating quotientsUse rounded numbers to estimate quotients.Example 6Estimate the quotient of 27.49 ÷ 3.12 by rounding to the nearest whole number.Round each number to the nearest whole number.
Rounding off to the first digit is called?
Rounding to the first digit is simply called rounding. This will make the number equal to the same as what the number truly is.
When rounding to the nearest whole number why do 5.43 an 4.68 both round to 5?
It's the nature of rounding. When rounding to the nearest whole number, look at the tenths place. If that digit is 4 or less (like the first number) zero it and everything to the right of it out. If that digit is 5 or higher, (like the second number) increase the target digit by one and zero everything to the right of it out. 5.43 is closer to 5 than to 6. 4.68 is closer to 5 than to 4.
What is the round of 3.09 to the nearest whole number?
3 Only 3.5 and above will be rounded of to 4 2.5 to 3.4999999999999999999 and below will be round off to 3. U consider the first decimal place when rounding of to the nearest whole number
What is the estimate of the product 79 and 13?
The idea is to round both numbers to the nearest multiple of 10 (in this case), then multiply. After rounding, you should be able to do the multiplication in your head - but if you have trouble with that, try to do it with pencil and paper first.
Estimate 5.12 plus 4.35 by first rounding to the nearest whole number?
It is 5 + 4 = 9.
Estimate and acirc and 136 and 1462633211987 by first rounding each number to the nearest thousand.?
There is only one number, 2633211987 in the question so why estimate?
Estimate 5.12 plus 4.35 by first rounding to the nearest whole number.?
The estimated answer is 20.
What are the rules to Estimating products and quotients of mixed numbers?
Estimating sumsUse rounded numbers to estimate sums.Example 1Give an estimate for the sum of 19.61 and 5.07 by rounding to the nearest tenth.Round each number to the nearest tenth.Example 2Estimate the sum of 19.61 + 5.07 by rounding to the nearest whole number.Round each number to a whole number.Estimating differencesUse rounded numbers to estimate differences.Example 3Give an estimate for the difference of 12.356 - 5.281 by rounding to the nearest whole number.Round each number to the nearest whole number.Now subtract.So 12.356 - 5.281 ≈ 7.Estimating productsUse rounded numbers to estimate products.Example 4Estimate the product of 4.7 × 5.9 by rounding to the nearest whole number.Round each number to a whole number.So 4.7 × 5.9 ≈ 30.Again, in decimals, as in whole numbers, if both multipliers end in .5, or are halfway numbers, rounding one number up and one number down will give you a better estimate of the product.Example 5Estimate the product of 7.5 × 8.5 by rounding to the nearest whole number.You can also round the first number down and the second number up and get this estimate.In either case, your approximation will be closer than it would be if you rounded both numbers up, which is the standard rule.Estimating quotientsUse rounded numbers to estimate quotients.Example 6Estimate the quotient of 27.49 ÷ 3.12 by rounding to the nearest whole number.Round each number to the nearest whole number.
What is 34.76 - 13.21 by first rounding each number to the nearest ten?
what is 34.76 rounded the nearest ten eqaul
What is 137 11 68 by first rounding each number to the nearest tens?
It is: 140+10+70 = 220
What is 67.73 54.521 first rounding each number to the nearest whole number?
68 + 55 = 123
What is 99 rounded to nearest ten?
100. rounding to the tenth only suggests you look at the first number(being the rightmost number) and round accourdingly
Ian mailed a package that weighed 5.63 pounds. What is the first step in rounding this number to the nearest tenth What is the next step What is 5.63 rounded to the nearest tenth?
5.6
What is 18.7 rounded to the nearest hundredths?
18.70
What Estimate the answer to 398.22 93.87 by first rounding each number to the nearest one?
398.22 * 93.87 = 398 * 94 = (400 - 2)*(90 + 4) = 36000 + 1600 - 180 - 8 = 37,412 The exact answer, using a calculator, is 37380.9114. So the estimate is too large by 0.08%
Rounding to the nearest whole number?
to round to the nearest whole number you have to look at the first number and if it is greater than 4 round it up but if it is less than 4 round it down hope this helps
