五年级（上）小数的简算

73.8－1.64－13.8－5.36 66.86－8.66－1.34 0.25×16.2×43.72×3.5＋6.28×3.5

73.81.6413.85.3666.868.661.340.25×16.2×4 －－－－－ 3.72×3.56.28×3.536.83.96.125.48(9.40.52) ＋－－－－ 4.8×7.878×0.523.6×1026.4×0.253.6÷4 ＋＋ 324.90.94.84.8×0.5(1.250.125)×8 ＋－－－ 4.8×100.156.5×9.956.57.09×10.80.8×7.09 ＋－ 4.025.40.985.171.83.213.75(3.756.48) ＋＋－－－＋ 3.687.562.687.852.340.854.6635.61.815.67.2 ＋－＋－＋－－－ 3.822.90.189.19.64.83.67.140.532.47 ＋＋＋＋－－－