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用简便方法计算下面各题99÷4.5 12÷1.5÷2 1.28×6-1.28-1.28×545×101 4÷2.5 12.5×1.3×0.8.
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用简便方法计算.0.3×2.5×0.40.78×1012.5×(8+0.4)1.25×0.7×0.89.8×2.550.8×101-50.84.6×99+4.60.25×32×0.125
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用简便方法计算下面各题,要写出计算过程.①1.25×0.25×32②0.2×60.4+60.4+9.8.
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用简便方法计算. ①1.25×0.25×32②0.25×3.78×4③6.74×10.1④0.85×99⑤6.8×3.7+6.8×6.3.
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能简算的要用简便方法计算①3.28×0.46+6.72×0.46②9.73×2.8-4.73×2.8③1.35×6.2+5.79÷0.3④27.9+3.6×2.5÷0.48⑤0
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用简便方法计算,写出简算过程(1)2.5×3.2×1.25(2)4.05-(2.05+527)(3)5.39+127+4.61+57(4)0.588×123+4×9.412+
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请用简便方法计算.58+34+4226+(74+66)16×50×2(39×4)×2525×2415×14.