The 4 in 4.88 is in the ones place. Then the first 8 is in the tenths place and the second 8 is in the hundreths place. Now forget the 4 for now and just treat the .88 like 88. Round it up to the nearest ten place wich would be 90. Now put back the for and turn the 90 into a decimal. Then you will have your awnser.
The first decimal point is tenth. 4.88 when rounding, we just look at the number right after the number you want to round to. it's 8 right? since 8 is closer to 10 than 0, we round it to 4.9 (4.8 + 0.10)
