What is 351.68 rounded to the nearest tenth?

351.7

Step-by-step explanation:

Look at the tenths space which is one place to the right of the decimal. It is a 6.

Then look at the number behind it: if the number behind is is 4 or less the number in front stays the same, if the number behind it is 5 or more the number in front goes up one more

so there is an 8 behind the 6, so you round the 6 to a 7

351.7

Step-by-step explanation:

The first number after the decimal is the tenth. Round up if the second number is 5 or above, round down if the second number is below 5.