What is 2.123 round to the nearest tenth?

Answer 1

When you round a number to a specific place value, you always look at the number(s) to the right of the said place value.

In your case, you're rounding to the tenths, so you'd look at the hundredths.

2.123

In the rules of rounding, If the number is 5 or more, you round up. If the number is 4 or less, you round down. Is 2 more than 5 or less than 4? It's less than 4 so we round down.

2.100

Therefore, 2.123 rounded to the nearest tenth is 2.1.