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1、6.73 X 9.8小数乘法运算律练习题4.4 X 2.50.125X 883.4 X 1.021.25X3.7X0.8 3.5 X1.73+8.17X3.58.6X 1.82+0.78 X 8.67.5 X 0.36 - 0.36 X 6.58.13+99X 8.136.34X 990.27 X 76+7.6 X 7.30.25X1.3X0.40.125X642.5X 7.1 X43.26X5.73.26X0.79.9X 212 8.75X 118.757.28 X 99+7.2855.6X9955.61.25X 213X 0.80.68X 1014.3 X 50X 0.219.625 (4
2、.379 9.625)3.42X5.74.3X3.428.05X3.4+7.6642.64X 0.516.12X9916.125.2 X0.90.9 6.58 X 4.5X 0.926 X 15.7 + 15.7 X 24(2.275+ 0.625) X 0.283.94+34.3 X 0.21.2 X (9.6 - 2.4) - 4.8 4.85 + 0.35宁1.48.7 X 17.4 - 8.7X 7.48.9X 1.1 X4.72.7 X 5.4X3.93.6 X 9.85-5.462.8X0.5+1.58324.9 0.94.8 4.8X0.5(1.25 0.125) X813.5 X0.984.8X 100.156.5 X 9956.57.09 X10.80.8X7.09 12.5 X8.812.5X0.4X 2.5X840.5 - 0.81 X 0.18(9.37+9.37+9.37+9.37) X 2.50.68 -(5.2 -3.5 ) X 1.254.8 X( 15 - 2.4 )0.87 X 3.16+4.646.81+6.81 X 990.25 X185X 404.4 X0.83.4X0.87.69 X101