It is 300000.
It is front-end estimation.
It is 3000000000.
27.60 rounded to one decimal place is 27.6. The first digit to the right of the . is the tenth.
To round 851.392 to the nearest one, we look at the digit in the tenths place, which is 3. Since 3 is less than 5, we round down the digit in the ones place, which is 9. Therefore, 851.392 rounded to the nearest one is 851.
To round off 128,674 to leave one nonzero digit, you would round it to 100,000.
0.2.
It is 400.
It is 300000.
It is 6000000.
It is 300.
It is 500.
It is front-end estimation.
500
It is 90000.
500500
It is 5000000.