What is 456.9873 to 1 decimal place?

457.0

457.0

You look at the number after the first decimal place (in this case 8) because it's more than or equal to 5, you round it up.

If it was 456.93...
To 1 decimal place the answer is 456.9

You need the zero at the end because otherwise you're answer is not technically to any decimal places.

457

What they said. Just 457 though, dont put a .0 on the end.

1)
456.9873
= 457.0 (rounded to 1 decimal place)

2)
456.9873
= 457.00 (rounded to 2 decimal place)

457.0<------1 decimal place

456.99<-----2 decimal places

457.0 the 8 changes the 9 to 0 carry 1 to next place value

457.0

457.0

The 9 rounds up to 10, which means the 1 has to carry.

In a similar way, if it was 459.9873 it would round to 460.0, because the other 9 would also round up to 10, meaning the 1 would need carrying.

You still include the zero after the decimal point. This makes it clear that your answer is accurate to one decimal place.

456.9873 v
456.987 ^
456.99 ^
457.0 -

That's not how you should round though. Don't do that.

Though the answer is correct.

You must put .0 on the end- otherwise it is not to one decimal place.

To one decimal place means it's between 456.5 and 457.5

This is a standard used to determine precision basically...

Uh read up on significant figures.