五年级上册数学期末考点简便计算专项练习

五年级上册数学期末考点简便计算专项练习一、归类练习：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)7.325-(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÷0.25×43.5×9.93.5×99+3.53.5×101-3.53.5×9.9+3.5×0.13.5×2.7+35×0.733.5×2.7-3.5×0.7★(32+5.6)÷0.8★3.5÷0.6-0.5÷0.64.9÷1.47÷0.25÷47.35÷(7.35×0.25)二、混合练习：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+11.332.31×1.2×0.5(2.5-0.25)×0.49.16×1.5-0.5×9.163.6-3.6×0.54.5÷1.8930÷0.6÷563.4÷2.5÷0.44.25÷2.5×9.9+0.115÷(0.15×0.4)2.7÷45五年级上册数学期末考点简便计算专项练习一、归类练习：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-(5.325-1.7)=7.325-3.325-3.29=7.325-5.325-1.7=7.325-5.325+1.7=4-3.29=2-1.7=2+1.7=0.71=0.3=3.7(减法交换)(减法的性质)(前面减号，脱括号变符号)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=357(先拆数，乘法结合律)(拆数，乘法结合律)(拆数，乘法分配律)0.25×4÷0.25×43.5×9.93.5×99+3.5=(0.25÷0.25)×(4×4)=3.5×(10-0.1)=3.5×(99+1)=1×16=3.5×10-3.5×0.1=3.5×100=16=35-0.35=34.65=350（同级运算交换)(拆数，乘法分配律)(乘法分配律)3.5×101-3.53.5×9.9+3.5×0.13.5×2.7+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=35(乘法分配律)(乘法分配律)(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÷47.35÷(7.35×0.25)=4.9÷(7×0.2)=7÷(0.25×4)=1÷0.25=4.9÷7÷0.2=7÷1=7.35÷7.35÷0.25=0.7÷0.2=7=4=3.5(除法的性质)(除法的性质)(拆数，除法的性质)二、混合练习：3.07-0.38-1.621.29+3.7+2.71+6.38-2.45-1.55=3.07-(0.38+1.62)=(1.29+2.71)+(3.7+6.3)=8-(2.45+1.55)=3.07-2=4+10=8-4=1.07=14=4(减法的性质)(加法交换律和加法结合律)(减法的性质)3.25+1.79-0.59+1.7523.4-0.8-13.4-7.20.32×403=(3.25+1.75)+(1.79-0.59)=(23.4-13.4)-0.8-7.2=0.32×(400+3)=5+1.2=10-(0.8+7.2)=0.32×400+0.32×3=6.2=10-8=2=128+0.96(同级运算交换)(减法交换和减法的性质)=128.96(拆数，乘法分配律)3.2+0.36+4.8+1.641.23+3.4-0.23+6.60.25×36=(3.2+4.8)+(0.36+1.64)=(1.23-0.23)+(3.4+6.6)=0.25×4×9=8+2=1+10=1×9=10=11=9(加法交换律和加法结合律)(同级运算交换)(拆数，乘法结合律)12.7-(3.7+0.84)36.54-1.76-4.540.25×0.73×4=12.7-3.7-0.84=36.54-4.54-1.76=0.25×4×0.73=9-0.84=32-1.76=1×0.73=8.14=30.24=0.73(减法的性质)(减法交换)(乘法交换律和乘法结合律)7.6×0.8+0.2×7.60.85×1990.25×8.5×4=7.6×(0.8+0.2)=0.85×(200-1)=0.25×4×8.5=7.6×1=0.85×200-0.85×1=1×8.5=7.6=170-0.85=169.15=8.5(乘法分配律)(拆数，乘法分配律)(乘法交换律和乘法分配律)1.28×8.6+0.72×8.612.5×0.96×0.810.4-9.6×0.35=(1.28+0.72)×8.6=12.5×0.8×0.96=10.4-3.36=2×8.6=10×0.96=7.04=17.2=9.6(无简算)(乘法分配律)(乘法交换律和乘法结合律)0.8×(4.3×1.25)3.12+3.12×9928.6×101-28.6=0.8×1.25×4.3=3.12×(1+99)=28.6×(101-1)=1×1.25=3.12×100=28.6×100=1.25=312=2860(乘法交换律和乘法结合律)(乘法分配律)(乘法分配律)(4.23+6.17)×0.80.86×15.7-0.86×14.72.4×102=10.4×0.8=0.86×(15.7-14.7)=2.4×(100+2)=8.32=0.86×1=2.4×100+2.4×2(无简算)=0.86=240+4.8(乘法分配律)=244.8(拆数，乘法分配律)14-7.32-2.682.64+8.67+7.36+11.332.31×1.2×0.5=14-(7.32+2.68)=(2.64+7.36)+(8.67+11.33)=2.31×(1.2×0.5)=14-10=10+20=2.31×0.6=4=30=1.386(减法的性质)(加法交换律和加法结合律)(乘法结合律)(2.5-0.25)×0.49.16×1.5-0.5×9.163.6-3.6×0.5=2.5×0.4-0.25×0.4=9.16×(1.5-0.5)=3.6×(1-0.5)=1-0.1=9.16×1=3.6×0.5(可转化成3.6÷2)=0.9=9.16=1.8(乘法分配律)(乘法分配律)(乘法分配律)4.5÷1.8930÷0.6÷563.4÷2.5÷0.4=4.5÷(9×0.2)=930÷(0.6×5)=63.4÷(2.5×0.4)=4.5÷9÷0.2=930÷3=63.4÷1=0.5÷0.2=310=63.4=2.5(除法的性质)(除法的性质)(拆数，除法的性质)4.25÷2.5×9.9+0.115÷(0.15×0.4)2.7÷45=1.7×9.9+1.7×0.1=15÷0.15÷0.4=2.7÷(9×5)=1.7×(9.9+0.1)=100÷0.4=2.7÷9÷5=1.7×10=250=0.3÷5=17(除法的性质)=0.06(前半部分死算，后半部分利(拆数，除法的性质）用积不变的规律转化，最后用乘法分配律)