1、103 3.97106 3、用四舍五入法对下列各数取近似数。0.0000982(精确到万分位) 2.60632(精确到十分位) 5.78075(精确到0.01) 0.0698(精确到0.01) 4、计算。 2 ()3 (1)2 (4)4 13 3 1300000 10000 7100000 37900 200 1200 50000000 10300 1104 9105 8.2103 3.24108 3.4107 1.81102 4.8106 8.51105 0.000772(精确到万分位) 29608.2(精确到十分位) 55.0798(精确到0.1) 0.00523(精确到0.001) 1
2、()3 (4)2 (1)3 42 170000 30000000 69000000 130000 600000 30000000 8100 79500 9104 5108 7.1107 3.22102 4.6105 9.75102 2107 4.780.0000915(精确到万分位) 2675.48(精确到十位) 37.6363(精确到0.1) 0.00938(精确到0.01) ()3 (6)2 (4)4 53 900000 7000000 300 393000000 11000 4700 8800000 86800000 1107 3107 2.6106 7.363102 8.5103 2.
3、5106 2.510.0000958(精确到万分位) 52.5313(精确到十位) 36.2364(精确到0.001) 0.00828(精确到0.01) ()2 (7)3 (4)4 1219000000 200 6500000 38400 14000 6000 750000 66500 9103 4102 2.2104 9.34103 3.4107 1.76108 4.7108 1.890.000926(精确到万分位) 0.437501(精确到十分位) 89.07(精确到0.01) 0.0791(精确到0.01) 4 ()3 (5)3 (4)4 73 5 6000 1000000 78000
4、4970000000 2000 26000000 3800 773000 5107 9103 2.4108 4.261.8105 4.11108 7.7104 9.850.000083(精确到万分位) 8.46926(精确到个位) 1.67998(精确到0.001) 0.0985(精确到0.001) ()2 (8)2 (1)4 52120000 1000000 1300000 3390000 600000 33000 670000 8450000000 8102 4105 6.4103 5.07104 5.4102 1.88107 4.2106 2.930.0000919(精确到万分位) 0.
5、749586(精确到十分位) 0.718566(精确到0.01) 0.0083(精确到0.1) ()2 (10)3 (1)2 53 1800 1000000 7400 2400000000 1600 25000000 94000 318000 8104 4102 3.6102 7.62103 2.86106 7.2107 6.880.000743(精确到万分位) 567.495(精确到个位) 49.9414(精确到0.01) 0.0533(精确到0.001) 6 ()2 (4)3 (1)3 6217000000 800 1700 24000000 200000 100000 8100 2870000000 107 7.5102 4.77 3.8106 1.06106 6.9107 1.280.000771(精确到万分位) 75098.1(精确到个位) 0.292339(精确到0.1) 0.00953(精确到0.001) ()2 (8)3 (3)4 7215000 60000000 400000 28500000 50000 16000000 2500000 1350000000 106 8107 6.3102 6.07 6.3106 2.69108 1.6106 6.86108
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