1、102 5.52102 3、用四舍五入法对下列各数取近似数。0.0000759(精确到万分位) 0.614735(精确到十分位) 4.37915(精确到0.01) 0.00592(精确到0.001) 4、计算。 1 ()2 (3)3 (1)4 62 5 130000 2000000 3500 551000000 100000 1100000 8500 218000 6102 7102 3.8108 4.83104 5.4103 5.45105 9.3103 4.79106 0.0000991(精确到万分位) 94482.2(精确到十位) 9.03317(精确到0.1) 0.0785(精确到0.
2、001) 2 ()2 (2)2 (1)3 33 3 12000000 40000000 30000000 4170000000 8000 17000000 830000 250000 6108 1105 7.7104 4.04 2.3106 8.09106 1.5107 9.770.000924(精确到万分位) 0.67034(精确到十位) 64.5259(精确到0.001) 0.0966(精确到0.1) ()2 (7)2 (4)3 225000000 5000 9600 43200000 1300 4500000 9700000 81100000 5106 7105 3.8107 4.79
3、9.4102 3.05103 8.4104 8.660.0000503(精确到万分位) 9.6169(精确到十分位) 39.9923(精确到0.001) 0.00606(精确到0.01) ()3 (7)3 (3)3 922000 20000 9800000 9400 7000000 44000000 520000 212000000 102 1105 6.5104 9.439.2105 3.45104 3.6104 5.730.000632(精确到万分位) 66.923(精确到十位) 4.11826(精确到0.1) 0.00669(精确到0.001) ()2 (3)2 (4)4 92 6000
4、0 9000000 68000000 29800000 100 49000000 58000 300000000 8107 2105 8.5107 1.6108 7.4106 7.24108 2.9105 6.85105 0.0000578(精确到万分位) 47.4185(精确到十位) 81.4735(精确到0.001) 0.0815(精确到0.001) 4 ()3 (6)2 (4)2 33 600000 20000000 9600000 6590000 5000000 1200 27000 752000000 1102 4106 9.2107 7.015.2102 9.36107 5.210
5、3 7.820.000928(精确到万分位) 0.275576(精确到十分位) 2.71003(精确到0.1) 0.00982(精确到0.01) ()3 (9)2 (3)4 10312000000 80000000 4000 30500000 12000000 180000000 8000 375000 105 4102 6.9106 6.117.1103 3.39106 6.1107 0.0000567(精确到万分位) 87159.3(精确到十分位) 1.85355(精确到0.1) 0.0765(精确到0.001) ()2 (2)3 (2)4 83200 2000000 3000 7440000000 16000 480000 1400000 722000000 2108 4107 3.7108 2.119.1106 9.71107 5.9108 8.590.000993(精确到万分位) 5828.03(精确到个位) 5.4546(精确到0.1) 0.0728(精确到0.001) ()2 (7)3 (4)2 631500 400000 8800000 3800000 800000 800000 82000000 185000 8108 2107 4.6106 2.094.7105 9.21105
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