Sometimes it is advantageous to express a value in round numbers. To round to a particular place, look at the digit immediately to the right of the one you want to round to, in this case, the second greatest place. If that digit is 4, 3, 2, 1 or 0, zero it and everything to the right of it out. If that digit is 5, 6, 7, 8 or 9, increase your target digit by one and zero everything to the right of it out. If your target digit is 9, it will become a zero and increase the digit to the left of it by one.
In the number 3,400 the greatest place would be the 3. And in 800, the greatest place would be the 8. Basically it is the highest value in a number.
What would be 159.45 if you round it to the greatest nonzero place
0.9
It is 300000.
20000
It is 80000.
It is 500000.
900
To round 25.691 to the greatest place, you would look at the digit in the tenths place, which is 9. Since 9 is greater than or equal to 5, you would round up. Therefore, 25.691 rounded to the greatest place is 25.7.
Round 152+269 to the greatest place value
10000
200,000