问题的缘起:某人在网络上抛出问题:“在近似计算150(3~(1/2))(精确到1)时,取3~(1/2)≈1.7?还是、3~(1/2)≈1.73或3~(1/2)≈1.732?”讨论的记要:网名1:为了近似计算结果的可靠,我认为应该多取几位,取3~(1/2)≈1.732网名2:近似计算中有这样一个规定:若明确要求计算结果保留几位小数,则中间运算过程要多保留一位小数.比如要求最后的计算结果保留一位小数,那么中间运算过程中的计算值应保留二位小数. The origin of the problem: Someone throws a question on the network: “In the approximate calculation of 150 (3 ~ (1/2)) (accurate to 1), take 3 ~ (1/2) ≈ 1.7? Or, (1/2) ≈1.73 or 3 ~ (1/2) ≈1.732? ”Note to the discussion: Screen name 1: In order to approximate the reliability of calculation results, I think we should take a few more, take 3 ~ (1 / 2) ≈1.732 Screen name 2: There is such a regulation in the approximate calculation: If it is explicitly required that the calculation result retain a few decimals, then the intermediate calculation process should retain one decimal place, for example, if the final calculation result requires one decimal place, then the middle Calculation of the calculation process should retain two decimal places.