I'm not allowed to play electronics until I get 50 points on Get More Math, A math program that my school uses. One of the questions is concerning me: "Jack had 6.9096 units of tapioca. How many units of tapioca did he have to the nearest hundredth?" I know hundredths are the second number after the decimal and it would be 0 and 0 tells the 9 to stay. My answer was 6.9. I was wrong. Can someone tell me the steps of this problem and how you did it.
Think of it in terms of "about" - if you're measuring a certain distance and it's 1.75939km, then that's about 2km (round to whole number, closer to 2 than 1), about 1.8km (rounded to tenth, slightly closer to 1.8 than 1.7) or about 1.76km (hundredth).
You do not replace any digits, merely trim the number beyond a certain point and decide whether to add +1 or not.
The first digit to the right of the decimal is tenths. Second is hundredths. Third is thousandths. And so on.
To round to hundredths you look at the third digit, thousandths. If that is 5 or higher you add 1 to the hundredths digit and drop the rest. If it is 4 or lower you simply drop the rest.
6.9096 becomes 6.91