17.31 rounds to:
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You take the number before the number you want to round it to. Round to tens: 97112770 (7 is greater then 4, so you round up) round to hundreds: 97112800 (6 is greater then 4 so you round up) round to thousands:97113000 (greater then 4, round up) round to ten thousands: 97113000 (greater then 4, round up) round to hundred thousands: 97100000 (less then 4, round down) round to millions: 97000000 (less then 4 round down) round to billions: 10,000,000 (more then 4 round up)
To round to the nearest whole number, round down to 60. To round to the nearest hundred, round up to 100.
round up
Benjamin Banneker was the African-American mathematician who served as a surveyor on the team that planned the District of Columbia. He lived from 1731 to 1806.
Round off to the nearest cent, means round off to the nearest hundredths or round off to two decimal.