0.126 rounded to the nearest hundreath =

0.13 is your answer you are looking for.

The hundredth spot is the second number to the right of the decimal. We, first, look at the far right number, in this case is 6, and we round it. Since 6 is rounded to ten, it rounds up the number next to it to a three. Since the hundredth number changed, we have no more work! The answer is 0.13! Hope this helps. :)

She should use 12/3 to measure