Jonathan G. answered • 12/28/12

Patient, intelligent tutor for various subjects

To round a number, you must look at the number in the place immediately after the place to which you are to round to. In this case you are to round to the ten-thousands place, indicated by the 8 as underlined, and you must look to the thousands place as highlighted in green:

5,789,345.678

Rounding the number down would mean the answer would be:

5,780,000

Rounding up would make the answer:

5,790,000

To determine whether you are expected to round up or down, you must look at the instructions for the question. Normally, you are expected to round to the nearest number for that place. If that is the case, then you look to the next place(the thousands place in this case), and if that number is 5 or greater, then rounding up would be closer, therefore the correct answer. However, to trick you, you may be asked instead to simply round any number down, or to round any number up. Therefore, the correct answer may depend on the way the question is asked.