1、103 6.4102 6.56102 3、用四舍五入法对下列各数取近似数。0.000717(精确到万分位) 5.56707(精确到十位) 3.41698(精确到0.1) 0.0943(精确到0.1) 4、计算。 1 ()3 (6)3 (3)4 92 5 15000 700 75000 804000000 90000 3600 910000 39000000 8107 1102 3.7104 8.61105 104 5.69106 7104 7.95107 0.000855(精确到万分位) 5.5968(精确到十分位) 13.3016(精确到0.01) 0.005(精确到0.01) ()2 (4
2、)2 (4)4 13 3 1400000 10000 700000 988000000 7000 470000 8900000 6430000 6105 9107 8.7102 5103 1.9107 4.48104 4.5103 6.030.000595(精确到万分位) 57526.6(精确到十位) 63.6458(精确到0.01) 0.00707(精确到0.1) ()2 (1)3 (1)4 82 2 80000 3000 35000000 663000 130000 20000 24000 847000 1108 7105 8.8104 4.75 9.2105 1.11107 6.3104
3、 1.50.000848(精确到万分位) 9.40353(精确到十位) 7.4727(精确到0.1) 0.00971(精确到0.1) ()3 (5)3 (3)2 1213000000 7000 13000 63500000 20000000 3600000 49000 83000 9102 6104 5.2103 8.371.2104 7.69105 6.5104 6.990.000054(精确到万分位) 5.15745(精确到个位) 32.7533(精确到0.01) 0.0813(精确到0.001) 6 ()3 (7)2 (1)4 10315000000 500 12000000 90000
4、 600 20000 7400000 6340000000 107 6107 4107 3.68106 9.4103 3.28103 3.1107 7.60.0000685(精确到万分位) 8311.41(精确到个位) 0.653786(精确到0.1) 0.056(精确到0.01) ()2 (1)2 (1)4 102 7000 400 6100000 9590000000 1500 480000000 940000 38300000 8104 5106 2.8108 9.49 5.1103 3.82108 8107 4.450.000804(精确到万分位) 69.4255(精确到十分位) 37
5、.7035(精确到0.01) 0.0712(精确到0.001) ()2 (4)3 (2)2 22 1000000 7000 370000 6000000 10000000 35000 350000 4700 2103 6106 5.4106 6.277.1107 4.61104 5.9103 5.39104 0.000693(精确到万分位) 2144.49(精确到十分位) 5.22682(精确到0.1) 0.0805(精确到0.01) ()2 (10)2 (4)4 103 1000 90000 9800 11500000 1000000 33000 17000000 10500000 107 8105 6.1105 5.85 8.5108 8.94106 3.8102 3.330.0000726(精确到万分位) 9168.53(精确到十位) 8.18165(精确到0.01) 0.0829(精确到0.1) ()2 (6)2 (4)2 32 1600 40000000 70000 420000 40000 90000 91000000 103000 105 7104 9.02108 6.68106 5.1107 5.95
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