五年级数学简便计算题及答案3.29+0.73+2.273.29-0.73-2.277.5+2.5-7.5+2.57.325-3.29-3.3257.325-(5.325+1.7)3.29+0.73-2.29+2.273.29×0.25×40.125×8.80.25×0.280.125×3.2×2.535×10.20.25×4÷0.25×43.5×101-3.53.5×9.9+3.5×0.13.5×2.7+35×0.733.5×2.7-3.5×0.7(32+5.6)÷0.83.5÷0.6-0.5÷0.64.9÷1.47÷0.25÷47÷0.1257.35÷(7.35×0.25)7.35÷(7.35÷0.25)3.07－0.38－1.621.29＋3.7＋2.71＋6.38－2.45－1.553.25＋1.79－0.59＋1.7523.4－0.8－13.4－7.20.32×4033.2＋0.36＋4.8＋1.641.23＋3.4－0.23＋6.60.25×3612.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×47.6×0.8＋0.2×7.60.85×1990.25×8.5×41.28×8.6＋0.72×8.612.5×0.96×0.810.4－9.6×0.350.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.6（4.23＋6.17）×0.80.86×15.7－0.86×14.72.4×10214－7.32－2.682.64＋8.67＋7.36＋11.33答案3.29＋0.73＋2.273.29－0.73－2.277.5＋2.5－7.5＋2.5=3.29＋（0.73＋2.27）=3.29－（0.73＋2.27）=（7.5－7.5）＋（2.5＋2.5）=3.29＋3=3.29－3=0＋5=6.29=0.29=5（加法结合律）（减法的性质）（同级运算交换）7.325－3.29－3.3257.325－(5.325＋1.7)=7.325－3.325－3.29=7.325－5.325－1.7=4－3.29=2－1.7=0.71=0.3（减法交换）（减法的性质）3.29＋0.73－2.29＋2.273.29×0.25×40.125×8.8=（3.29－2.29）＋（0.73＋2.27）=3.29×（0.25×4）=0.125×8×1.1=1＋3=3.29×1=1×1.1=4=3.29=1.1（同级运算交换）（乘法结合律）（先拆数，乘法结合律）0.25×0.280.125×3.2×2.535×10.2=0.25×4×0.07=（0.125×8）×（0.4×2.5）=35×（10＋0.2）=1×0.07=1×1=35×10＋35×0.2=0.07=1=350＋7（先拆数，乘法结合律）（拆数，乘法结合律）=357（拆数，乘法分配律）0.25×4÷0.25×4=（0.25÷0.25）×（4×4）=1×16=16（同级运算交换）3.5×101－3.53.5×9.9＋3.5×0.1★3.5×2.7＋35×0.73=3.5×（101－1）=3.5×（9.9＋0.1）=3.5×2.7＋3.5×7.3=3.5×100=3.5×10=3.5×（2.7＋7.3）=350=35=3.5×10（乘法分配律）（乘法分配律）=35（先利用积不变的规律转化，然后再用乘法分配律）3.5×2.7－3.5×0.7★(32＋5.6)÷0.8★3.5÷0.6－0.5÷0.6=3.5×（2.7－0.7）=32÷0.8＋5.6÷0.8=(3.5－0.5)÷0.6=3.5×2=40＋7=3÷0.6=7=47=5（乘法分配律）（后2题类似分配律，但只适用于（a＋b）÷c和(a－b)÷c，而a÷(b＋c)和a÷(b－c)不能用。）4.9÷1.47÷0.25÷4★7÷0.125=4.9÷（7×0.2）=7÷（0.25×4）=7×8=4.9÷7÷0.2=7÷1=56=0.7÷0.2=7（乘除法转化规律，转化时=3.5符号相反，转化前后的2数（拆数，除法的性质）（除法的性质）相乘得1。）7.35÷(7.35×0.25)★7.35÷(7.35÷0.25)=7.35÷7.35÷0.25=7.35÷7.35×0.25=1÷0.25=1×0.25=4=0.25（除法的性质）（前面是除号，脱括号符号