round 16.81 to the nearest gram.

Is that 16.81 grams? If so -- it's 17 grams.

17

To round 16.81 to the nearest gram, you would need to consider the tenths decimal place.

First, you need to determine whether to round up or down. If the value in the tenths place is 5 or higher, you will round up. If it is 4 or lower, you will round down. In this case, the value in the tenths place is 8, so you will round up.

Next, you simply drop the decimal and keep the whole number. Since 16 grams is the whole number closest to 16.81, rounding up, we can say that rounding 16.81 to the nearest gram gives you 17 grams.

16.81