Question

5.78 round to the nearest one decimal

Answer 1

Since your number in the second decimal place is above 4, then you round the number to the left of it up by one. If you have a number that is 4 or lower, you keep the same number. For example 2.63 would be 2.6 whereas if it was 2.67 it would be 2.7.

Answer 2

so its 5.8

Answer 3

that will be 5.7 because there is 7 with 8 so we simply remove the last number without adding anything.