To round off 430 you will have to round up or down. To round down then it till be 400 to round up it will be 500

You would round it down... to 7000.

To round to the nearest whole number, round down to 60. To round to the nearest hundred, round up to 100.

To round of, means to make the number to the closest higher or lower integer.

If the number is closer to the lower integer, then you round down.

If the number is closer to the higher integer, then you round up.

If the differences is equal e.g. 2.5, the you must also round up.

You round off the number 16 to the nearest ten by rounding up to 20. You look at the number to the right of the number you want to round, if it is a 5 or above you round up and if it is a 4 or under you round down.