Question

Estimate the sum or difference, by rounding each number to its largest place (front-end rounding)7,654.891–849.999

Answer 1

7200

Explanation:

In front-end rounding, you round to the largest place value of the number.

In the number 7,654.891:

• Th number with the largest place value i= 7

,

• The digit after it is 6, ,6>5 so we round up,.

Therefore:

`7,654.891\approx8000`

imilarly, in the number 849.999:

• The number with the largest place value = 8

,

• The digit after it is 4, ,4<5, so we ,round down,.

Therefore:

`849.999\approx800`

Thus:

`7,654.891-849.999\approx8000-800=7,200`

The difference is 7,200.