0.45×2.5 0.8×1.25 0.3×3.6＝ 0.3×0.30.45×2.5＝ 0.8×1.25＝ 0.3× 0.3×0.3＝
10×0.07＝ 0.3×1.4＝ 0.05×7＝ 0.92×0.4＝ 0.2×0.26＝ 1.2×0.3 0.14×4＝ 0.02×0.1＝ 1.2×0.3＝0.2×0.4＝ 8.2＋1.＝ 2.3×4 2.4×5＝ 100－35.22＝ 2.3×4＝.5×0.4.5×0.4＝ 2.4× 0.20.22×4＝ 3.23.25×0＝ 0.90.9－0.50.52＝ 3.99×1＝ 0×3.52= 12.5×48 8÷10 = 10-1.8-7.2= 0.43+3.57= 2.5×4×12=0.9×0.8= 1.05×100= 1÷0.5= 0.96÷3= 5.4÷6= 1.05×100= 1÷ 0.96÷3= 1.47÷0.7= 5.4÷ 1.47÷0.7= 0.16.5×10= 0.56×100= 3.78×100= 4÷0.8= 3.215×100= 0.8×10= 4.08×100= 1.1×0.2 = 0.6×0.8 = 3×0.9= 2.5×0.4= 3.6×0.4= 12.5×8= 50×0.04= 80×0.3 = 1.1×9= 0.16×5 1.78 0.6 = 1.2×0.5-0.4 0.16×5 ﹦ 2.2 = 0.6 = 1.2×0.5-0.4 = 0.5-0.4 = 0.7÷0.01 = 0.01 = ＋2.2 = 9.6÷ 0.7÷0.01 2.5×0.4 12 5.37×0+4.63 2.5×0.4 = 0.4 = 1.25×8÷1.25 8÷1.25 = 1.25 = 6.6÷0.66 6.6÷0.66 = 0.66 = 5.37×0+4.63 = 0+4.63 = －3.9= 1.25×8÷3.9＋2.03＝ 3.5＝ 1.6+2.4×0.3 = 2.14 4.2÷－0.9＝ 27＋456＋73= 0.3×0.3= 7.2＋2.8＝ 0.9÷0.01＝ 12÷0.3= 2.87÷0.7＝ 13÷4＝ 0.96÷0.3＝ 1.5×0.4＝ 7÷0.25＝ 2.5×0.7×0.8= 8－2.5＝ 16÷1.6＝ 5.6×1.01= 8×（2.5＋0.25）＝ 0.3664.32÷16＝ 4.2÷0.14.2÷0.1＝ ＋0.64＝ 64.32÷1672.8÷0.8＝ 8.4÷4.2＝ 13.8＋9.9＝ 24×25＝ 005×08＝ 256－037＝ 1.25×0.8×0.5＝ 12×2.5＝ 1.23×3＝ 3.2÷1.6＝ 3.5＋3.5×3＝ 19.6÷2＝ 8.8÷2.2= 0.75×4＝ （1.5＋0.25）×4＝ 0.5×0.8=8.4×0.2= 1.6×0.2＝ 7.2×0.3= 2.8×0.3＝ 0.9÷0.15= 1.8×0.4= 5.5÷0.55= 0.08×1008×100= 2.2÷0.11= 5.4646＋4.54.54= = 12.5×0.8= 0.35×0.3= 2.8×4= 19.6÷4= 22.5×4= 12.5×0.8= 0.35×0.3= 1.4×5= 1.4×5= 2.8× 19.6÷4= 22.5×
2、用竖式计算 0.396÷1.2= 0.396÷1.2= 0.756÷0.36= 15.6× 15.6×15.6×13= 13= 0.18×15= 0.18×15= 0.025×14= 3.06×36= 0.04×0.120.04×0.12＝ 3.84×2.6≈ 5.76×3＝（保留一位小数） 7.15×22 7.15×22 90.75÷3.3 3.68×0.25 16.9÷0.13 16.9÷0.13 1.55÷ 1.55÷1.55÷3.9 3.9 3.7×0.016 13.76×0.8= 13.76×0.8= 5.2×0.6 8.4× 8.4×8.4×1.3 1.3 6.4×0.5 6.4×0.5 4.48×0.4 5.25× 5.25×5.25×5 5 35.4×4.2 35.4×4.2 0.042× 0.042×0.042×0.54 0.54 0.76×0.32 0.25×0.046 0.25×0.046 2.52×3.4 1.08× 1.08×1.08×25 25 0.12×0.5×0.12×0.5×0.160.5×0.16＝ 4.8×0.25 0.125×1.4≈（保留两位小数） 0.25＝ （保留三位小数） 10.1÷（商用循环小数） 2.5÷0.7= 2.5÷0.7= 10.1÷3.3= 3.3= （用乘法验算） （用除法验算） 10.75÷12.5= 10.75÷12.5= 3.25×9.04= 3、脱式计算（能简算的要简算） 16.12×2.5×7.1×2.5×7.1×4 7.1×4 16.12×16.12×9999＋16.12 5.2×0.9＋0.9 7.28×99+7.28 7.28×99+7.28 4.3×4.3×50×50×0.2 50×0.2 64－2.64×2.64×0.5 0.5 26×15.7＋15.7×26×15.715.7×24 24 (2.275 ＋0.625)×0.625)×0.28 0.28 2.7×3.94+34.3×0.2 3.94+34.3×0.2 2.7×5.4×5.4×3.9 5.4×3.9 1.2× 1.2×1.2×(9.6÷(9.6÷2.4)÷(9.6÷2.4)÷4.8 2.4)÷4.8 8.9×1.1×8.9×1.1×1.1×4.7 4.7 6.58×6.58×4.5×4.5×0.9 4.5×0.9 3.6×9.85-5.46 9.85-5.46 4.8－4.8×8.05×3.4+7.6 8.05×3.4+7.6 2.8×0.5+1.58 4.8×0.5 0.5 0.5+1.58 (1.25－0.125)×32＋4.9－0.9 0.125)×8 8 56.5×56.5×9999＋56.5 4.8×100.1 4.8×100.1 7.09×10.8－0.8×0.8×7.09 7.09 4.85 + 0.35 ÷1.4 0.87× 9.5×12.5×0.4×12.5×0.4×0.4×2.5×2.5×8 2.5×8 0.87×3.16+4.64 3.16+4.64 101 （5.2 -3.5）× 1.25 8.7 ×0.68 ÷17.4 - 8.7 ×7.4 （15 ÷） 40.5 ÷ 0.81 × 0.18 4.8 × 2.4 2.13.×2.13.×0×0×8257 0×8257 0.25× 4.4×6.81+6.81×99 6.81+6.81×99 0.25×0.25×185×185×40 185×40 0.8－3.4×3.4×0.8 0.8 ．5 4．2.×(9.37+9.37+9.37+9.37)× 2(9.37+9.37+9.37+9.37)× 2.×1.251.25＋4.2×4.2×1.75 1.75 2.5×2.37×6.3+2.37×2.37×6.3+2.37×6.3+2.37×3.7 3.7 1.25×0.32 1.25×0.32 3.8×3.8×10.1 10.1 2.5×(3.8×2.5×(3.8×(3.8×0.04) 0.04) 7.69×7.69×101 101 3.8×3.8×10.1 10.1 0.25×39+0.25 0.25×39+0.25 0.125×0.125×72 72 46×46×0.33+54×0.33+54×0.33 0.33+54×0.33 6.81+6.81× 0.25×(8×5.27) ×(8×5.27) 1.25 99 185×40 185×40 6.8×0.75÷6.8×0.75÷0.75÷0.5 0.5 3.75÷3.75÷0.1250.125–2.75 1.53+23.4÷7.2 13.5×9.5×99 9.5×99 0.98 12.5×12.5×8.8 8.8
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