6. What is the place value at which the number 379 854 652 rounds to 380 000 000?
7. Write in Hindu- Arabic the MCMLXXXVII.
8. Wha is the smallest that rounds to 600 to the nearest hundred?
9. How many numbers including 600 itself, round to 600 to the nearest hundred?
10. Round each addend to the nearest thousand and estimate the sum of 4623 + 6421 + 7509.
