Question

How do you round 0.79 to the nearest tenth?

Answer 1

If the hundredths place (the second digit after the decimal point) is 5-9, then the tenths place must be rounded up.

Explanation:

If the hundredths place (the second digit after the decimal point) is 5, 6, 7, 8, or 9, then the tenths place must be rounded up. Since the hundredths place is a 9, then you would round up 0.79 to 0.80.

Answer 2

The approximation is `0.8`. See explanation.

Explanation:

To approximate a number to the nearest tenth you have to look at the hundredths digit. If it is `5` or more you have to add `1` to the tenths digit, else if it is lower than `5` you leave the tenths digit unchanged.

Here we have:

`0.7color(red)(9)`

The hundredths digit (marked in red) is higher than `4` so to round you have to increase the tenths digit:

`0.79~~0.8`