845 rounded to the nearest hundred is 800. This is because the value in the tens place "4" is less than 5.
500
7000
800
967 rounded to the nearest tenths is 970. This is because the value in the ones place "7" is greater than 5. When rounding anything greater than or equal to 5 gets rounded up while everything below 5 gets rounded down.
300
2400
To the nearest hundred it is zero and to the nearest hundredth, which you may have meant, the value will not change at all.
To the nearest hundred, 100.
To the nearest hundred million
845 rounded to the nearest hundred is 800. This is because the value in the tens place "4" is less than 5.
500
100.00
5,451 rounded to the nearest hundred is: 5,500. This is because the value in the tens place is "5". When rounding anything equal to or greater than 5 gets rounded up while everything else gets rounded down.
900
1,565 to the nearest hundred is: 1600. This is because the value in the tens place "6" is equal to or greater than 5. Anything below 5 would need to be rounded down.
7000