按括号内的要求,用四舍五入法对下列各数取近似数:π精确到个位______1.804精确到0.01______0.00356精确

按括号内的要求,用四舍五入法对下列各数取近似数:π精确到个位______1.804精确到0.01______0.00356精确到万分位______.

π≈3(精确到个位);
1.804≈1.80(精确到0.01);
0.00356≈0.0036(精确到万分位).
故答案为3,1.80,0.0036.
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