1.3/7×49/9-4/3 2.8/9×15/36+1/27 3.12×5/6–2/9×3 4.8×5/4+1/4 5.6÷3/8–3/8÷6 6.4/7×5/9+3/7×5/9 7.5/2-（3/2+4/5） 8.7/8+（1/8+1/9） 9.9×5/6+5/6 10.3/4×8/9-1/3 11.7×5/49+3/14 12.6×（1/2+2/3） 13.8×4/5+8×11/5 14.31×5/6–5/6 15.9/7-（2/7–10/21） 16.5/9×18–14×2/7 17.4/5×25/16+2/3×3/4 18.14×8/7–5/6×12/15 19.17/32–3/4×9/24 20.3×2/9+1/3 21.5/7×3/25+3/7 22.3/14××2/3+1/6 23.1/5×2/3+5/6 24.9/22+1/11÷1/2 25.5/3×11/5+4/3 26.45×2/3+1/3×15 27.7/19+12/19×5/6 28.1/4+3/4÷2/3 29.8/7×21/16+1/2 30.101×1/5–1/5×21 31.50＋160÷40 32.120-144÷18+35 33.347+45×2-4160÷52 34（58+37）÷（64-9×5） 35.95÷（64-45） 36.178-145÷5×6+42 37.812-700÷（9+31×11） 38.85+14×（14+208÷26） 39.（284+16）×（512-8208÷18） 40.120-36×4÷18+35 41.（58+37）÷（64-9×5） 42.(6.8-6.8×0.55)÷8.5 43.0.12×4.8÷0.12×4.8 44.（3.2×1.5+2.5）÷1.6（2）3.2×（1.5+2.5）÷1.6 45.6-1.6÷4=5.38+7.85-5.37= 46.7.2÷0.8-1.2×5=6-1.19×3-0.43= 47.6.5×（4.8-1.2×4）=0.68×1.9+0.32×1.9 48.10.15-10.75×0.4-5.7 49.5.8×（3.87-0.13）+4.2×3.74 50.32.52-（6+9.728÷3.2）×2. 51.（136+64）×（65-345÷23） 52.420+580-64×21÷28 53.（58+370）÷（64-45） 6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.8）*6 4.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)*6 3.68＋7.56－2.687.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.2 3.82＋2.9＋0.18＋9.19.6＋4.8－3.67.14－0.53－2.47 5.27＋2.86－0.66＋1.6313.35－4.68＋2.6573.8－1.64－13.8－5.36 47.8－7.45+8.80.398+0.36+3.6415.75+3.59－0.59+14.25 66.86－8.66－1.340.25×16.2×4(1.25－0.125)×8 3.6×1023.72×3.5＋6.28×3.536.8－3.9－6.1 15.6×13.1－15.6－15.6×2.14.8×7.8＋78×0.5232＋4.9－0.9 4.8×100.156.5×9.9＋56.57.09×10.8－0.8×7 25.48－(9.4－0.52)4.2÷3.5320÷1.25÷8 18.76×9.9＋18.763.52÷2.5÷0.43.9－4.1＋6.1－5.9 5.6÷3.59.6÷0.8÷0.44.2×99＋4.2 17.8÷(1.78×4)0.49÷1.41.25×2.5×323.65×10.1 15.2÷0.25÷40.89×100.1146.5－(23＋46.5) 3.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.7 27.5×3.7－7.5×3.78.54÷2.5÷0.40.65×1013.2×0.25×12.5 (45.9－32.7)÷8÷0.1253.14×0.68＋31.4×0.0325.6÷1.25÷0.8÷2.5÷0.4 7.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.2 3.9×2.7＋3.9×7.318－1.8÷0.125÷0.812.7×9.9＋1.27 21×（9.3－3.7）－5.615.02-6.8-1.025.4×11-5.4 2.3×16+2.3×23+2.39.43-（6.28-1.57）3.65×4.7－36.5×0.37 46×57＋23×8613.7×0.25－3.7÷42.22×9.9+6.66×6.7 101×0.87-0.91×8710.7×16.1-15.1×10.70.79×199 4.8+8.63+5.2+0.375.93+0.19+2.811.76+0.195+3.24 2.35+1.713+0.287+7.651.57+0.245+7.436.02+3.6+1.98 0.134+2.66+0.8661.27+3.9+0.73+16.17.5＋4.9－6.5 3.07－0.38－1.621.29＋3.7＋2.71＋6.38－2.45－1.5 3.25＋1.79－0.59＋1.7523.4－0.8－13.4－7.20.32×403 3.2＋0.36＋4.8＋1.641.23＋3.4－0.23＋6.60.25×36 12.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×5 7.6×0.8＋0.2×7.60.85×1990.25×8.5×4 1.28×8.6＋0.72×8.612.5×0.96×0.810.4－9.6×0.5 0.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.3 0.86×15.7－0.86×14.72.4×1022.31×1.2×0.5 14－7.32－2.682.64＋8.67＋7.36＋11.3370÷28 （2.5－0.25）×0.49.16×1.5－0.5×9.163.6－3.6×0.5 63.4÷2.5÷0.44.9÷1.43.9÷（1.3×5） （7.7＋1.54）÷0.72.5×2.42.7÷4515÷（0.15×0.4） 0.35×1.25×2×0.832.4×0.9＋0.1×32.415÷0.25 4.5÷1.84.2÷3.5930÷0.6÷5 小学五年级数学试题 一、填空题 1.7.2×0.63的积里有()位小数． 2.由7个1000，9个0.1和3个0.01组成的数是()． 3.把3.964的小数点向右移动三位，小数就()倍． 4.8.6×0.72=()×7.2 5.把0.836扩大成小数部分是一位的小数是()，小数点向()移动了()位． 二、简算题 1.2.4×12.5= 2.9.43×101= 3.3.4×12.5+6.6×12.5= 4.0.125×9.3×0.8= 5.700×0.34×2.9= 三、计算题 1.用竖式计算．18.25×34= 2.用竖式计算．9.35×4.2= 3.用竖式计算．15.07×9.8= 4.用竖式计算．7.02×0.56=(得数保留两位小数) 5.81.25×0.6×9.3 四、文字叙述题 1.38.62的4.5倍是多少? 2.把7.2与9.5的积扩大30倍，结果是多少? 3.4.25与0.9的差乘以0.8，结果是多少? 4.一个数与4.8的差被0.5除,商是36,这个数是多少?(用方程解) 5.7.2比某数的2倍少0.8,某数是多少?(用方程解) 1.3/7×49/9-4/3 2.8/9×15/36+1/27 3.12×5/6–2/9×3 4.8×5/4+1/4 5.6÷3/8–3/8÷6 6.4/7×5/9+3/7×5/9 7.5/2-（3/2+4/5） 8.7/8+（1/8+1/9） 9.9×5/6+5/6 10.3/4×8/9-1/3 11.7×5/49+3/14 12.6×（1/2+2/3） 13.8×4/5+8×11/5 14.31×5/6–5/6 15.9/7-（2/7–10/21） 16.5/9×18–14×2/7 17.4/5×25/16+2/3×3/4 18.14×8/7–5/6×12/15 19.17/32–3/4×9/24 20.3×2/9+1/3 21.5/7×3/25+3/7 22.3/14××2/3+1/6 23.1/5×2/3+5/6 24.9/22+1/11÷1/2 25.5/3×11/5+4/3 26.45×2/3+1/3×15 27.7/19+12/19×5/6 28.1/4+3/4÷2/3 29.8/7×21/16+1/2 30.101×1/5–1/5×21 31.50＋160÷40 32.120-144÷18+35 33.347+45×2-4160÷52 34（58+37）÷（64-9×5） 35.95÷（64-45） 36.178-145÷5×6+42 37.812-700÷（9+31×11） 38.85+14×（14+208÷26） 39.（284+16）×（512-8208÷18） 40.120-36×4÷18+35 41.（58+37）÷（64-9×5） 42.(6.8-6.8×0.55)÷8.5 43.0.12×4.8÷0.12×4.8 44.（3.2×1.5+2.5）÷1.6（2）3.2×（1.5+2.5）÷1.6 45.6-1.6÷4=5.38+7.85-5.37= 46.7.2÷0.8-1.2×5=6-1.19×3-0.43= 47.6.5×（4.8-1.2×4）=0.68×1.9+0.32×1.9 48.10.15-10.75×0.4-5.7 49.5.8×（3.87-0.13）+4.2×3.74 50.32.52-（6+9.728÷3.2）×2. 51.（136+64）×（65-345÷23） 52.420+580-64×21÷28 53.（58+370）÷（64-45） 6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.8）*6 4.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)*6 3.68＋7.56－2.687.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.2 3.82＋2.9＋0.18＋9.19.6＋4.8－3.67.14－0.53－2.47 5.27＋2.86－0.66＋1.6313.35－4.68＋2.6573.8－1.64－13.8－5.36 47.8－7.45+8.80.398+0.36+3.6415.75+3.59－0.59+14.25 66.86－8.66－1.340.25×16.2×4(1.25－0.125)×8 3.6×1023.72×3.5＋6.28×3.536.8－3.9－6.1 15.6×13.1－15.6－15.6×2.14.8×7.8＋78×0.5232＋4.9－0.9 4.8×100.156.5×9.9＋56.57.09×10.8－0.8×7 25.48－(9.4－0.52)4.2÷3.5320÷1.25÷8 18.76×9.9＋18.763.52÷2.5÷0.43.9－4.1＋6.1－5.9 5.6÷3.59.6÷0.8÷0.44.2×99＋4.2 17.8÷(1.78×4)0.49÷1.41.25×2.5×323.65×10.1 15.2÷0.25÷40.89×100.1146.5－(23＋46.5) 3.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.7 27.5×3.7－7.5×3.78.54÷2.5÷0.40.65×1013.2×0.25×12.5 (45.9－32.7)÷8÷0.1253.14×0.68＋31.4×0.0325.6÷1.25÷0.8÷2.5÷0.4 7.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.2 3.9×2.7＋3.9×7.318－1.8÷0.125÷0.812.7×9.9＋1.27 21×（9.3－3.7）－5.615.02-6.8-1.025.4×11-5.4 2.3×16+2.3×23+2.39.43-（6.28-1.57）3.65×4.7－36.5×0.37 46×57＋23×8613.7×0.25－3.7÷42.22×9.9+6.66×6.7 101×0.87-0.91×8710.7×16.1-15.1×10.70.79×199 4.8+8.63+5.2+0.375.93+0.19+2.811.76+0.195+3.24 2.35+1.713+0.287+7.651.57+0.245+7.436.02+3.6+1.98 0.134+2.66+0.8661.27+3.9+0.73+16.17.5＋4.9－6.5 3.07－0.38－1.621.29＋3.7＋2.71＋6.38－2.45－1.5 3.25＋1.79－0.59＋1.7523.4－0.8－13.4－7.20.32×403 3.2＋0.36＋4.8＋1.641.23＋3.4－0.23＋6.60.25×36 12.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×5 7.6×0.8＋0.2×7.60.85×1990.25×8.5×4 1.28×8.6＋0.72×8.612.5×0.96×0.810.4－9.6×0.5 0.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.3 0.86×15.7－0.86×14.72.4×1022.31×1.2×0.5 14－7.32－2.682.64＋8.67＋7.36＋11.3370÷28 （2.5－0.25）×0.49.16×1.5－0.5×9.163.6－3.6×0.5 63.4÷2.5÷0.44.9÷1.43.9÷（1.3×5） （7.7＋1.54）÷0.72.5×2.42.7÷4515÷（0.15×0.4） 0.35×1.25×2×0.832.4×0.9＋0.1×32.415÷0.25 4.5÷1.84.2÷3.5930÷0.6÷5 1.3/7×49/9-4/3 2.8/9×15/36+1/27 3.12×5/6–2/9×3 4.8×5/4+1/4 5.6÷3/8–3/8÷6 6.4/7×5/9+3/7×5/9 7.5/2-（3/2+4/5） 8.7/8+（1/8+1/9） 9.9×5/6+5/6 10.3/4×8/9-1/3 11.7×5/49+3/14 12.6×（1/2+2/3） 13.8×4/5+8×11/5 14.31×5/6–5/6 15.9/7-（2/7–10/21） 16.5/9×18–14×2/7 17.4/5×25/16+2/3×3/4 18.14×8/7–5/6×12/15 19.17/32–3/4×9/24 20.3×2/9+1/3 21.5/7×3/25+3/7 22.3/14××2/3+1/6 23.1/5×2/3+5/6 24.9/22+1/11÷1/2 25.5/3×11/5+4/3 26.45×2/3+1/3×15 27.7/19+12/19×5/6 28.1/4+3/4÷2/3 29.8/7×21/16+1/2 30.101×1/5–1/5×21 31.50＋160÷40 32.120-144÷18+35 33.347+45×2-4160÷52 34（58+37）÷（64-9×5） 35.95÷（64-45） 36.178-145÷5×6+42 37.812-700÷（9+31×11） 38.85+14×（14+208÷26） 39.（284+16）×（512-8208÷18） 40.120-36×4÷18+35 41.（58+37）÷（64-9×5） 42.(6.8-6.8×0.55)÷8.5 43.0.12×4.8÷0.12×4.8 44.（3.2×1.5+2.5）÷1.6（2）3.2×（1.5+2.5）÷1.6 45.6-1.6÷4=5.38+7.85-5.37= 46.7.2÷0.8-1.2×5=6-1.19×3-0.43= 47.6.5×（4.8-1.2×4）=0.68×1.9+0.32×1.9 48.10.15-10.75×0.4-5.7 49.5.8×（3.87-0.13）+4.2×3.74 50.32.52-（6+9.728÷3.2）×2. 51.（136+64）×（65-345÷23） 52.420+580-64×21÷28 53.（58+370）÷（64-45） 6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.8）*6 4.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)*6 3.68＋7.56－2.687.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.2 3.82＋2.9＋0.18＋9.19.6＋4.8－3.67.14－0.53－2.47 5.27＋2.86－0.66＋1.6313.35－4.68＋2.6573.8－1.64－13.8－5.36 47.8－7.45+8.80.398+0.36+3.6415.75+3.59－0.59+14.25 66.86－8.66－1.340.25×16.2×4(1.25－0.125)×8 3.6×1023.72×3.5＋6.28×3.536.8－3.9－6.1 15.6×13.1－15.6－15.6×2.14.8×7.8＋78×0.5232＋4.9－0.9 4.8×100.156.5×9.9＋56.57.09×10.8－0.8×7 25.48－(9.4－0.52)4.2÷3.5320÷1.25÷8 18.76×9.9＋18.763.52÷2.5÷0.43.9－4.1＋6.1－5.9 5.6÷3.59.6÷0.8÷0.44.2×99＋4.2 17.8÷(1.78×4)0.49÷1.41.25×2.5×323.65×10.1 15.2÷0.25÷40.89×100.1146.5－(23＋46.5) 3.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.7 27.5×3.7－7.5×3.78.54÷2.5÷0.40.65×1013.2×0.25×12.5 (45.9－32.7)÷8÷0.1253.14×0.68＋31.4×0.0325.6÷1.25÷0.8÷2.5÷0.4 7.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.2 3.9×2.7＋3.9×7.318－1.8÷0.125÷0.812.7×9.9＋1.27 21×（9.3－3.7）－5.615.02-6.8-1.025.4×11-5.4 2.3×16+2.3×23+2.39.43-（6.28-1.57）3.65×4.7－36.5×0.37 46×57＋23×8613.7×0.25－3.7÷42.22×9.9+6.66×6.7 101×0.87-0.91×8710.7×16.1-15.1×10.70.79×199 4.8+8.63+5.2+0.375.93+0.19+2.811.76+0.195+3.24 2.35+1.713+0.287+7.651.57+0.245+7.436.02+3.6+1.98 0.134+2.66+0.8661.27+3.9+0.73+16.17.5＋4.9－6.5 3.07－0.38－1.621.29＋3.7＋2.71＋6.38－2.45－1.5 3.25＋1.79－0.59＋1.7523.4－0.8－13.4－7.20.32×403 3.2＋0.36＋4.8＋1.641.23＋3.4－0.23＋6.60.25×36 12.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×5 7.6×0.8＋0.2×7.60.85×1990.25×8.5×4 1.28×8.6＋0.72×8.612.5×0.96×0.810.4－9.6×0.5 0.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.3 0.86×15.7－0.86×14.72.4×1022.31×1.2×0.5 14－7.32－2.682.64＋8.67＋7.36＋11.3370÷28 （2.5－0.25）×0.49.16×1.5－0.5×9.163.6－3.6×0.5 63.4÷2.5÷0.44.9÷1.43.9÷（1.3×5） （7.7＋1.54）÷0.72.5×2.42.7÷4515÷（0.15×0.4） 0.35×1.25×2×0.832.4×0.9＋0.1×32.415÷0.25 4.5÷1.84.2÷3.5930÷0.6÷5 小学五年级数学试题 一、填空题 1.7.2×0.63的积里有()位小数． 2.由7个1000，9个0.1和3个0.01组成的数是()． 3.把3.964的小数点向右移动三位，小数就()倍． 4.8.6×0.72=()×7.2 5.把0.836扩大成小数部分是一位的小数是()，小数点向()移动了()位． 二、简算题 1.2.4×12.5= 2.9.43×101= 3.3.4×12.5+6.6×12.5= 4.0.125×9.3×0.8= 5.700×0.34×2.9= 三、计算题 1.用竖式计算．18.25×34= 2.用竖式计算．9.35×4.2= 3.用竖式计算．15.07×9.8= 4.用竖式计算．7.02×0.56=(得数保留两位小数) 5.81.25×0.6×9.3 四、文字叙述题 1.38.62的4.5倍是多少? 2.把7.2与9.5的积扩大30倍，结果是多少? 3.4.25与0.9的差乘以0.8，结果是多少? 4.一个数与4.8的差被0.5除,商是36,这个数是多少?(用方程解) 5.7.2比某数的2倍少0.8,某数是多少?(用方程解) 1.3/7×49/9-4/3 2.8/9×15/36+1/27 3.12×5/6–2/9×3 4.8×5/4+1/4 5.6÷3/8–3/8÷6 6.4/7×5/9+3/7×5/9 7.5/2-（3/2+4/5） 8.7/8+（1/8+1/9） 9.9×5/6+5/6 10.3/4×8/9-1/3 11.7×5/49+3/14 12.6×（1/2+2/3） 13.8×4/5+8×11/5 14.31×5/6–5/6 15.9/7-（2/7–10/21） 16.5/9×18–14×2/7 17.4/5×25/16+2/3×3/4 18.14×8/7–5/6×12/15 19.17/32–3/4×9/24 20.3×2/9+1/3 21.5/7×3/25+3/7 22.3/14××2/3+1/6 23.1/5×2/3+5/6 24.9/22+1/11÷1/2 25.5/3×11/5+4/3 26.45×2/3+1/3×15 27.7/19+12/19×5/6 28.1/4+3/4÷2/3 29.8/7×21/16+1/2 30.101×1/5–1/5×21 31.50＋160÷40 32.120-144÷18+35 33.347+45×2-4160÷52 34（58+37）÷（64-9×5） 35.95÷（64-45） 36.178-145÷5×6+42 37.812-700÷（9+31×11） 38.85+14×（14+208÷26） 39.（284+16）×（512-8208÷18） 40.120-36×4÷18+35 41.（58+37）÷（64-9×5） 42.(6.8-6.8×0.55)÷8.5 43.0.12×4.8÷0.12×4.8 44.（3.2×1.5+2.5）÷1.6（2）3.2×（1.5+2.5）÷1.6 45.6-1.6÷4=5.38+7.85-5.37= 46.7.2÷0.8-1.2×5=6-1.19×3-0.43= 47.6.5×（4.8-1.2×4）=0.68×1.9+0.32×1.9 48.10.15-10.75×0.4-5.7 49.5.8×（3.87-0.13）+4.2×3.74 50.32.52-（6+9.728÷3.2）×2. 51.（136+64）×（65-345÷23） 52.420+580-64×21÷28 53.（58+370）÷（64-45） 6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.8）*6 4.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)*6 3.68＋7.56－2.687.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.2 3.82＋2.9＋0.18＋9.19.6＋4.8－3.67.14－0.53－2.47 5.27＋2.86－0.66＋1.6313.35－4.68＋2.6573.8－1.64－13.8－5.36 47.8－7.45+8.80.398+0.36+3.6415.75+3.59－0.59+14.25 66.86－8.66－1.340.25×16.2×4(1.25－0.125)×8 3.6×1023.72×3.5＋6.28×3.536.8－3.9－6.1 15.6×13.1－15.6－15.6×2.14.8×7.8＋78×0.5232＋4.9－0.9 4.8×100.156.5×9.9＋56.57.09×10.8－0.8×7 25.48－(9.4－0.52)4.2÷3.5320÷1.25÷8 18.76×9.9＋18.763.52÷2.5÷0.43.9－4.1＋6.1－5.9 5.6÷3.59.6÷0.8÷0.44.2×99＋4.2 17.8÷(1.78×4)0.49÷1.41.25×2.5×323.65×10.1 15.2÷0.25÷40.89×100.1146.5－(23＋46.5) 3.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.7 27.5×3.7－7.5×3.78.54÷2.5÷0.40.65×1013.2×0.25×12.5 (45.9－32.7)÷8÷0.1253.14×0.68＋31.4×0.0325.6÷1.25÷0.8÷2.5÷0.4 7.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.2 3.9×2.7＋3.9×7.318－1.8÷0.125÷0.812.7×9.9＋1.27 21×（9.3－3.7）－5.615.02-6.8-1.025.4×11-5.4 2.3×16+2.3×23+2.39.43-（6.28-1.57）3.65×4.7－36.5×0.37 46×57＋23×8613.7×0.25－3.7÷42.22×9.9+6.66×6.7 101×0.87-0.91×8710.7×16.1-15.1×10.70.79×199 4.8+8.63+5.2+0.375.93+0.19+2.811.76+0.195+3.24 2.35+1.713+0.287+7.651.57+0.245+7.436.02+3.6+1.98 0.134+2.66+0.8661.27+3.9+0.73+16.17.5＋4.9－6.5 3.07－0.38－1.621.29＋3.7＋2.71＋6.38－2.45－1.5 3.25＋1.79－0.59＋1.7523.4－0.8－13.4－7.20.32×403 3.2＋0.36＋4.8＋1.641.23＋3.4－0.23＋6.60.25×36 12.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×5 7.6×0.8＋0.2×7.60.85×1990.25×8.5×4 1.28×8.6＋0.72×8.612.5×0.96×0.810.4－9.6×0.5 0.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.3 0.86×15.7－0.86×14.72.4×1022.31×1.2×0.5 14－7.32－2.682.64＋8.67＋7.36＋11.3370÷28 （2.5－0.25）×0.49.16×1.5－0.5×9.163.6－3.6×0.5 63.4÷2.5÷0.44.9÷1.43.9÷（1.3×5） （7.7＋1.54）÷0.72.5×2.42.7÷4515÷（0.15×0.4） 0.35×1.25×2×0.832.4×0.9＋0.1×32.415÷0.25 4.5÷1.84.2÷3.5930÷0.6÷5