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How do you estimate the product of 3.14 and 5.125 by rounding each number to the nearest whole number before multiplying?
Wiki User
∙ 10y ago
3 x 5 = 15
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.
Explain whether it is easier to estimate the product 13.72 x 47.28 by using compatible numbers or by rounding each factor to the nearest whole number?
Compatible numbers would be easier. Rounding gives you 14 x 47. Compatible numbers could be 13 x 50 which would be closer to the actual product.
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.
Enter each product use rounding to the nearest ten to each factor 74x18 equals?
70 x 20 = 1400
Which number is closest to the product of 22 and 49?
Actual answer = 1078. Rounding to the nearest 10 = 20+50=70
How do you estimate the product by rounding 288722 to the nearest hundred thousand and 1421 to the nearest thousand?
300000 and 1000
What is the product of 612 and 490 by rounding both numbers to the nearest hundred before multiplying?
600 x 500 = 300000 612 x 490 = 299880
How you would estimate the product of greater numbers?
By rounding off.
How do you use rounding to estimate a product?
You round the two numbers you are multiplying and try it. Lets use 16 and 13 and round to the nearest ten. We would round 16 to 20, and 13 to 10. Then we multiply 20 and 10 and get 200. So the answer would be around 200. The actual answer is 208 by the way.
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.
How do you estimate the product by rounding the greater factor 9 x 54?
9X60
How do you estimate the product by rounding both factors to the gr eatest place value 81x 58?
Rounding off, 80 x 60 = 4800. The actual product is 4698.
Explain whether it is easier to estimate the product 13.72 x 47.28 by using compatible numbers or by rounding each factor to the nearest whole number?
Compatible numbers would be easier. Rounding gives you 14 x 47. Compatible numbers could be 13 x 50 which would be closer to the actual product.
Using front end rounding, the best estimate of the product of 7.3 × 4 is?
28
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.
How do you use rounding to estimate the product 38 x 29?
40 x 30 = 1200
How do you estimate product using decimal?
This when you are rounding off 43210 copy,56789 add 1
