Note that when you are rounding, look at the digit directly next to what you want to round to. If the digit is 5 or greater, round up, if it is 4 or less, round down.
Round to the ones place value: 676,052
Round to the tens place value: 676,050
Round to the hundreds place value: 676,100
Round to the thousands place value: 676,000
Round do the ten thousands place value: 680,000
Round to the hundred thousands place value: 700,000