3.3 is the approximate value of 3 and 1 / 3, of which 3 and 1 / 3 is called true value. The approximate number obtained by the rounding method is 27, and the following numbers () may be true values （1）：26.48 （2）:26.54 (3):27.59 (4):26.96 （5）：27.04

3.3 is the approximate value of 3 and 1 / 3, of which 3 and 1 / 3 is called true value. The approximate number obtained by the rounding method is 27, and the following numbers () may be true values （1）：26.48 （2）:26.54 (3):27.59 (4):26.96 （5）：27.04

Because it is reserved to the individual place, so rounding the tenth place, (2), (4), (5) are in line with the meaning of the question

If the approximate value of a is 3.1, what is the value range of a? If the approximate value of a is 3.1, what is the value range of a?

3.05

Use the rounding method to approximate the following numbers according to the requirements in brackets
37.2994 [accurate to tens]
54670 [accurate to 100]
069971 [keep 3 significant digits]
03045 [accurate to 0.001]

37.30
fifty-four thousand six hundred and seventy
zero point zero seven
zero point zero three zero