Math

• Math

Use rounding to estimate the sum of the following numbers.
56+43

1. 100
2. 90
3. 80

Use rounding to estimate the sum of the following numbers.
287 + 149

1. 400
2. 500
3. 600
4. 300

Use rounding to estimate the difference of the following numbers.
629 - 444

1. 400
2. 300
3. 200
4. 100

Use rounding to estimate the difference of the following numbers.
730 - 535

1. 100
2. 200
3. 300
4. 400

First, add the following numbers. Then round the numbers to the nearest hundred and find the estimated sum. The estimated sum is not a rounded number of the original answer. (Copy carefully on scratch paper to work the problem.)
682 rounds to?
446 rounds to?
682+446=
682+446 rounds to?

Subtract the following numbers. Then round the numbers to the nearest hundred and find the estimated difference. (Copy carefully on scratch paper to work the problem.)
518 rounds to?
333 rounds to?
518-333=
518-333 rounds to?