五年级上册数学简便计算练习题及答案
小学数学五年级上册简便计算68道题(含答案)
.小学数学五年级上册简便计算68 道题(含详细答案)3.29+0.73+2.27 3.29-0.73-2.277.5+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+2.27 3.29 ×0.25 ×40.125 ×8.80.25 ×0.280.125 3×.2 ×2.535×10.20.25 ×4÷0.25 ×4 3.5 ×9.9 3.5 ×99+ 3.53.5 ×101-3.5 3.5 ×9.9+3.5 ×0.1 3.5 ×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÷0.1257.35 ÷(7.35 ×0.25)7.35 ÷(7.35 ÷0.25)3.07 - 0.38 -1.62 1.29 +3.7+2.71 +6.38-2.45 -1.55 3.25 +1.79 -0.59 +1.7523.4 -0.8 -13.4 -7.20.32 ×4033.2+0.36 +4.8+1.64 1.23 +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 ×14.7 2.4 ×10214 -7.32 -2.68 2.64 +8.67 +7.36 +11.33 2.31 ×1.2 ×0.5(2.5-0.25 )× 0.49.16 ×1.5-0.5× 9.16.3.6 -3.6 ×0.54.5÷1.8930 ÷0.6÷563.4 ÷2.5÷0.4 4.25 ÷2.5×9.9+ 0.173.9 ÷( 1.3×5)(7.7+1.54)÷ 0.72.5×2.4 2.7÷450.35 ×1.25 ×2×0.832.4 ×0.9+0.1×32.415 ÷0.2515÷( 0.15 ×0.4)小学数学五年级上册简便计算练习(答案卷)一、归类练习:3.29 +0.73 +2.27 3.29-0.73 -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 +2.27 3.29×0.25 ×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 3.5× 9.9 3.5 × 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=350(同级运算交换)=34.65(乘法分配律)(拆数,乘法分配律)3.5 × 101-3.5 3.5× 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。
五年级上册简便运算练习题及答案
五年级上册简便运算练习题及答案五年级上册简便运算练习题及答案请⽤简便⽅法计算下列各题0.25×0.20.125×3.2×2.535×40.20.25×4÷0.25×4.5×9.93.5×99+3.53.5×101-3.53.53.5×2.7-3.5×0.74.9÷3.57.35÷.353.29+0.73+2.273.29-0.73-2.2.5+2.5-7.5+2.57.325-3.29-3.32.325-7.325-×9.9+3.5×0.1.5÷0..5÷0.25÷÷7.325-×2.7+35×0.7÷0.6-0.5÷0.÷0.12÷83.29+0.73-2.29+2.23.29×0.25×0.125×8.863.4÷2.5÷0..9÷1.4.9÷÷0.70.35×1.25×2×0.828.6×101-28.614-7.32-2.62.64×0.47.6×0.8+0.2×7.60.25×362.5×2.432.4×0.9+0.1×32.40.86×15.7-0.86×14.7+8.67+7.36+11.39.16×1.5-0.5×9.163.60.85×19 ×3.2×2.552.7÷45 15÷0.252.4×102.31×1.2×0.5-3.6×0.0.25×8.5×4×40.20.125五年级数学简便计算练习卷四7.6×0.8+0.2×7.60.85×190.25×8.5×41.28×8.6+0.72×8. 12.5×0.96×0.810.4-9.6×0.350.8×3.12+3.12×9928.6×101-28.60.86×15.7-0.86×14..4×102.31×1.2×0.514-7.32-2.62.64+8.67+7.36+11.30÷28×0.49.16×1.5-0.5×9.163.6-3.6×0.5 4.5÷1..2÷3.30÷0.6÷563.4÷2.5÷0.4.9÷1.4.9÷÷0.72.5×2..7÷15÷0.35×1.25×2×0.82.4×0.9+0.1×32. 15÷0.25五年级数学简便计算练习卷三46×57+23×813.7×0.25-3.7÷.22×9.9+6.66×6.7101×0.87-0.91×810.7×16.1-15.1×10.70.79×1994.8+8.63+5.2+0.5.93+0.19+2.81 1.76+0.195+3.242.35+1.713+0.287+7.61.57+0.245+7.6.02+3.6+1.980.134+2.66+0.8661.27+3.9+0.73+16.1 .5+4.9-6.5 3.07-0.38-1.1.29+3.7+2.71+6.8-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.0.32×4033.2+0.36+4.8+1.61.23+3.4-0.23+6.60.25×3612.7-6.54-1.76-4.540.25×0.73×4五年级数学简便计算练习卷⼆18.76×9.9+18.763.52÷2.5÷0.4.9-4.1+6.1-5.95.6÷3.9.6÷0.8÷0..2×99+4.217.8÷0.49÷1. 1.25×2.5×323.65×10.115.2÷0.25÷40.89×100.1 146.5-3.83×4.56+3.83×5.444.36×12.5×89.7×99+9.727.5×3.7-7.5×3.78.54÷2.5÷0.0.65×101.2×0.25×12.5÷8÷0.1253.14×0.68+31.4×0.032.6÷1.25÷0.8÷2.5÷0.47.2×0.2+2.4×1..9×1.01.74×+1.5×2.263.9×2.7+3.9×7.318-1.8÷0.125÷0.12.7×9.9+1.27 21×-5.615.02-6.8-1.025.4×11-5.42.3×16+2.3×23+2..43- .65×4.7-36.5×0.37五年级数学简便计算练习卷⼀下⾯各题怎样算简便就怎样算.6.9+4.8+3.1 0.456+6.22+3.715.89+4.02+5.4+0.9.17-1.8-3.213.75-3.68+7.56-2.6.85+2.34-0.85+4.6635.6-1.8-15.6-7.23.82+2.9+0.18+9.1.6+4.8-3..14-0.53-2.475.27+2.86-0.66+1.13.35-4.68+2.65.8-1.64-13.8-5.3647.8-7.45+8.80.398+0.36+3.6415.75+3.59-0.59+14.2566.86-8.66-1.3 0.25×16.2××83.6×1023.72×3.5+6.28×3.536.8-3.9-6.115.6×13.1-15.6-15.6×2.14.8×7.8+78×0.522+4.9-0.94.8×100.16.5×9.9+56..09×10.8-0.8×7.0925.48-.2÷3.5320÷1.25÷8⼩学五年级上数学简便运算归类练习明确三点:1、⼀般情况下;四则运算的计算顺序是:有括号时;先算;没有括号时;先算;再算;只有同⼀级运算时;从左往右 .2、由于有的计算题具有它⾃⾝的特征;这时运⽤运算定律;可以使计算过程简单;同时⼜不容易出错.加法交换律:a+b=b+a加法结合律:+c=a+乘法交换律:a×b=b×a乘法结合律:×c=a×乘法分配律:×c=a×c+b×c3、注意;对于同⼀个计算题;⽤简便⽅法计算;与不⽤简便⽅法计算得到的结果相同.我们可以⽤两种计算⽅法得到的结果对⽐;检验我们的计算是否正确.⼀、变换位置当⼀个计算题只有同⼀级运算⼜没有括号时;我们可以带符号搬家.a+b+c=a+c+b a+b-c=a-c+b a-b+c=a+c-b a-b-c=a-c-b a×b×c=a×c×b a÷b÷c=a÷c÷b a×b÷c=a÷c×ba÷b×c=a×c÷b根据:加法交换律和乘法交换律12.06+5.07+2.91773+174-7730.34-10.2+9.6625×7×434÷4÷1.7102×7.3÷5.1125÷2××3÷7×3195-37-95⼆.加括号1、当⼀个计算题只有加减运算⼜没有括号时;我们可以在加号后⾯直接添括号;括到括号⾥的运算原来是加还是加;是减还是减.但是在减号后⾯添括号时;括到括号⾥的运算;原来是加;现在就要变为减;原来是减;现在就要变为加.根据加法结合律a+b+c=a+,a+b-c=a +,a-b+c=a-, a-b-c= a-1132+752+35874+295-952-383+81.06-19.72-20.282、当⼀个计算题只有乘除运算⼜没有括号时;我们可以在乘号后⾯直接添括号;括到括号⾥的运算;原来是乘还是乘;是除还是除.但是在除号后⾯添括号时;括到括号⾥的运算;原来是乘;现在就要变为除;原来是除;现在就要变为乘.根据乘法结合律a×b×c=a×, a×b÷c=a×,a÷b÷c=a÷, a÷b×c=a÷,1.06×2.5×417×0.6÷0. 18.6÷2.5÷0.400÷14×2三.去括号1、当⼀个计算题只有加减运算⼜有括号时;我们可以将加号后⾯的括号直接去掉;原来是加现在还是加;是减还是减.但是将减号后⾯的括号去掉时;原来括号⾥的加;现在要变为减;原来是减;现在就要变为加.a+= a+b+c a += a+b-c a- = a-b+c a-= a-b-c5.68+ 172+76- 19.68-2、当⼀个计算题只有乘除运算⼜有括号时;我们可以将乘号后⾯的括号直接去掉;原来是乘还是乘;是除还是除.但是将除号后⾯的括号去掉时;原来括号⾥的乘;现在就要变为除;原来是除;现在就要变为乘.a× = a×b×ca× = a×b÷ca÷ = a÷b÷ca÷ = a÷b×c0.25× 1.25×÷4÷1.25×四、乘法分配律的两种典型类型1、括号⾥是加或减运算;与另⼀个数相乘;注意分配×2125×6×24×86× 15×2、注意相同因数的提取.0.92×1.41+0.92×8.51.3×11.6-1.6×1.3五、⼀些简算⼩技巧1、巧借;可要注意还哦有借有还;再借不难嘛. 9999+999+99+921-9982、分拆;可不要改变数的⼤⼩哦3.2×12.5×1.25×883.6×0.253、注意构造;让算式满⾜乘法分配律的条件.3.8×9.9+0.382.6×9.998×3.27+6.54101×2.17-2.170.25×16.2××.6×1023.72×3.5+6.28×3.515.6×2.1-15.6×1.1.8×10.1 56.5×99+56.51.25×2.5×327.09×10.8-0.8×7.09.83×4.56+3.83×5.44.36×12.5×8。
五年级上册数学简便计算练习题及答案
五年级上册数学简便计算练习题及答案请用简便方法计算下列各题0.25×0.20.125×3.2×2.535×40.20.25×4÷0.25×4.5×9.93.5×99+3.53.5×101-3.53.53.5×2.7-3.5×0.74.9÷3.57.35÷.353.29+0.73+2.273.29-0.73-2.2.5+2.5-7.5+2.57.325-3.29-3.32.325-7.325-×9.9+3.5×0.1.5÷0..5÷0.25÷÷7.325-×2.7+35×0.7÷0.6-0.5÷0.÷0.12÷83.29+0.73-2.29+2.23.29×0.25×0.125×8.863.4÷2.5÷0..9÷1.4.9÷÷0.70.35×1.25×2×0.828.6×101-28.614-7.32-2.62.64×0.47.6×0.8+0.2×7.60.25×362.5×2.432.4×0.9+0.1×32.40.86×15.7-0.86×14.7+8.67+7.36+11.39.16×1.5-0.5×9.163.60.85×19 ×3.2×2.552.7÷4515÷0.252.4×102.31×1.2×0.5-3.6×0.0.25×8.5×4×40.20.125小学数学五年级上册简便计算归类练习一、当一个计算题只有同一级运算又没有括号时,我们可以“带符号搬家”。
五年级上册数学简便计算练习题及答案
五年级上册数学简便计算练习题及答案请用简便方法计算下列各题0.25×0.20.125×3.2×2.535×40.20.25×4÷0.25×4.5×9.93.5×99+3.53.5×101-3.53.53.5×2.7-3.5×0.74.9÷3.57.35÷.353.29+0.73+2.273.29-0.73-2.2.5+2.5-7.5+2.57.325-3.29-3.32.325-7.325-×9.9+3.5×0.1.5÷0..5÷0.25÷÷7.325-×2.7+35×0.7÷0.6-0.5÷0.÷0.12÷83.29+0.73-2.29+2.23.29×0.25×0.125×8.863.4÷2.5÷0..9÷1.4.9÷÷0.70.35×1.25×2×0.828.6×101-28.614-7.32-2.62.64×0.47.6×0.8+0.2×7.60.25×362.5×2.432.4×0.9+0.1×32.40.86×15.7-0.86×14.7+8.67+7.36+11.39.16×1.5-0.5×9.163.60.85×19 ×3.2×2.552.7÷4515÷0.252.4×102.31×1.2×0.5-3.6×0.0.25×8.5×4×40.20.125小学数学五年级上册简便计算归类练习一、当一个计算题只有同一级运算又没有括号时,我们可以“带符号搬家”.12.06+5.07+2.90.34+9.76-10.3425×7×434÷4÷1. 1.25÷25×0.102×7.3÷5.1二A、当一个计算题只有加减运算又没有括号时,我们可以在加号后面直接添括号,括到括号里的运算原来是加还是加,是减还是减.但是在减号后面添括号时,括到括号里的运算,原来是加,现在就要变为减;原来是减,现在就要变为加.a+b+c=a+ ,a+b-c=a +,a-b+c=a –,a-b-c= a-33-15.7-4.41.06-19.72-20.28.29+0.73-2.29+2.277.325-.29-0.73-2.27.325-.325-B、当一运算,原来是乘还是乘,是除还是除.但是在除号后面添括号时,括到括号里的运算,原来是乘,现在就要变为除;原来是除,现在就要变为乘.a×b×c=a×, a×b÷c=a×, a÷b÷c=a÷ ,a÷b×c=a÷,700÷14÷ 18.6÷2.5÷0.1.96÷0.5÷1.06×2.5×47÷0.25÷÷0.12÷.9÷三A、当一个计算题只有加减运算又有括号时,我们可以将加号后面的括号直接去掉,原来是加现在还是加,是减还是减.但是将减号后面的括号去掉时,原来括号里的加,现在要变为减;原来是减,现在就要变为加.5.68+19.68-B、当一个计算题只有乘除运算又有括号时,我们可以将乘号后面的括号直接去掉,原来是乘还是乘,是除还是除.但是将除号后面的括号去掉时,原来括号里的乘,现在就要变为除;原来是除,现在就要变为乘.0.25×1.25× .35÷四、乘法分配律的两种典型类型A,、括号里是加或减运算,与另一个数相乘,注意分配÷0. ×0.4÷0.7B、注意相同因数的提取.0.92×1.41+0.92×8.590.86×15.7-0.86×14.73.5÷0.6-0.5÷0.61.3×11.6-1.6×1..5×9.9+3.5×0.1.5×2.7+35×0.733.5×2.7-3.5×0.732.4×0.9+0.1×32..6×0.8+0.2×7.69.16×1.5-0.5×9.16五、一些简算小技巧A、巧借,可要注意还哦 ,有借有还,再借不难.9999+999+99+94821-998B、分拆,可不要改变数的大小哦3.2×12.5×251.25×88.6×0.25C/注意构造,让我们的算式满足乘法分配律的条件1.8×99+ 1.83.8×9.9+0.3.6×9.913.5×27+13.5×72+13.51.01×9. 102×0.83.5×101-3.5.5×9.9.5×99+3.50.67×10.1-6.3.6-3.6×0.50.85×1990.25×8.5×428.6×101-28.62.4×1020.25×3 0.125×3.2×2.55×40.22.31×1.2×0. 15÷0.2.5×2.4×40.20.125×8.80.25×0.280.125×3.2×2.528×21.6-2.8×16.6×1.7+0.56×83请用简便方法计算下列各题0.25×4÷0.25×4.9÷3.53.29+0.73+2.22.7÷457.325-3.29-3.3250.35×1.25×2×0.83.29×0.25×3.4÷2.5÷0..9÷1.414-7.32-2.62.64+8.67+7.36+11.33 五年级上册简便算法题10÷3.14-6.86÷3.1437.68÷0.25÷43.75-37.56-0.77÷144.5×9.80.7÷0.1250.7÷0.252.5×3.2×12.512.5×9.6×0.253.75-37.65÷0.4÷0.253.125÷8÷0.12537.65-4.75-3.2525×6.4×12.53.6×0.25答案10÷3.14-6.86÷3.1=÷3.1=3.14÷3.1=137.68÷0.25÷=37.68÷ =37.68÷1 =37.68 3.75- =3.75-2.75+1.=1+1.=2.337.56-=37.56-7.56-1=30-1=10.77÷1=0.77÷7÷=0.11÷=0.054.5×9.8=4.5× =4.5×10- 4.5×0.=45-0.=44.1 0.7÷0.125=÷ =0.56÷1 =0.50.7÷0.25=÷ =2.8÷1 =2.82.5×3.2×12.=× =1×100 =10012.5×9.6×0.25=×3× =10×3×1 =303.75- =3.75+1.25-2.8=5-2.=2.237.65÷0.4÷0.25.125÷8÷0.1257.65- 4.75-3.225×6.4×12.=25×4×0.2×8×12.5.6×0.2=×0.25.4÷9+5.6÷=。
五年级上册数学简便计算专项练习题及答案
五年级上册数学简便计算专项练习题及答案题目一:整数加减练习1. 计算:(-65)+ (-32)= _______2. 计算: 98 + (-52) = _______3. 计算: 165 + (-128) = _______4. 计算:(-189) + 76 = _______5. 计算: 42 + (-50) + 28 = _______答案:1. -972. 463. 374. -1135. 20题目二:小数加减乘除练习1. 计算: 3.2 + 1.5 = _______2. 计算: 5.7 - 2.4 = _______3. 计算:4.3 × 0.6 = _______4. 计算: 8.4 ÷ 2 = _______5. 计算: 27.6 ÷ 4 = _______答案:1. 4.72. 3.33. 2.584. 4.25. 6.9题目三:倍数与约数练习1. 8的倍数有: _______2. 6的倍数有: _______3. 12是()的倍数。
4. 42是()的约数。
5. 在14的倍数中,最小的一个是()。
答案:1. 8, 16, 24, 32, ...2. 6, 12, 18, 24, ...3. 34. 14, 21, 28, 425. 14题目四:平方数练习1. 判定下列数字是否是平方数: 36 _______2. 判定下列数字是否是平方数: 50 _______3. 判定下列数字是否是平方数: 144 _______4. 判定下列数字是否是平方数: 169 _______5. 判断一个数是否是平方数的方法是: _______答案:1. 是2. 不是3. 是4. 是5. 把一个数开平方,如果结果是整数,那它就是平方数,否则不是。
题目五:面积与周长练习1. 一张长方形纸片的长是12cm,宽是8cm,它的面积是 _______平方厘米。
2. 一个正方形的周长是20cm,它的边长是 _______ 厘米。
五年级上册数学简便计算练习题及答案
五年级上册数学简便计算练习题及答案请用简便方法计算下列各题0.25 X 0.20.125 X 3.2 X 2.535 X 40.20.25 X 4-0.25 X 4.5 X 9.93.5 X 99+3.53.5X101-3.53.53.5X2.7 -3.5X0.74.9 + 3.57.35 + .353.29+0.73+2.273.29-0.73-2.2.5+2.5-7.5+2.57.325- 3.29-3.32.325-7.325-X 9.9+3.5 X 0.1.5 - 0..5 - 0.25 — 7.325 - X 2.7+35 X 0.7 + 0.6 -0.5 + 0. + 0.12 +83.29+0.73- 2.29+2.23.29 X0.25X0.125X8.863.4+2.5+0..9 +1.4.9 ++ 0.70.35X1.25X2X0.828.6X101-28.614 -7.32 -2.62.64X 0.47.6X0.8+0.2X7.60.25X360.86 X 14.7 + 8.67 + 7.36 + 11.39.16 X 1.5 -2.5X2.432.4 X0.9 +0.1 X32.40.86 X15.7 -0.5 X 9.163.60.85 X 19 X 3.2 X 2.552.7 - 4515-0.252.4 X 102.31 X 1.2 X 0.5 -3.6X0.0.25 X8.5X4X40.20.125小学数学五年级上册简便计算归类练习一、当一个计算题只有同一级运算又没有括号时;我们可以“带符号搬家”.12.06 +5.07 +2.90.34 +9.76 -10.3425X7X434-4- 1. 1.25 - 25X 0.102 X 7.3 - 5.1二A、当一个计算题只有加减运算又没有括号时;我们可以在加号后面直接添括号;括到括号里的运算原来是加还是加;是减还是减. 但是在减号后面添括号时;括到括号里的运算;原来是加;现在就要变为减;原来是减;现在就要变为加.a+b+c=a+ ,a+b-c=a +,a-b+c=a - ,a-b-c= a-33-15.7-4.41.06 -19.72 -20.28.29+0.73-2.29+2.277.325- .29-0.73-2.27.325-.325B 、当一运算;原来是乘还是乘;是除还是除. 但是在除号后面添括号时;括到括号里的运算;原来是乘;现在就要变为除;原0.86 X 14.7 + 8.67 + 7.36 + 11.39.16 X 1.5 - 来是除;现在就要变为乘.a x b+c=a x,a xb x c=a x,a*b*c=a* ,a *b x c=a*,700- 14* 18.6 *2.5 *0.1.96 *0.5 * 1.06 x2.5 X47*0.25**0.12*.9*三A、当一个计算题只有加减运算又有括号时;我们可以将加号后面的括号直接去掉;原来是加现在还是加;是减还是减. 但是将减号后面的括号去掉时;原来括号里的加;现在要变为减;原来是减;现在就要变为加.5.68 +19.68 -B 、当一个计算题只有乘除运算又有括号时;我们可以将乘号后面的括号直接去掉;原来是乘还是乘;是除还是除. 但是将除号后面的括号去掉时;原来括号里的乘;现在就要变为除;原来是除;现在就要变为乘0.25x1.25x .35 *四、乘法分配律的两种典型类型A, 、括号里是加或减运算;与另一个数相乘;注意分配*0. x0.4*0.7B 、注意相同因数的提取.0.92x1.41 +0.92x8.590.86 x15.7-0.86x14.73.5 *0.6 -0.5*0.61.3x11.61.6 X 1..5 X 9.9+3.5 X 0.1.5 X2.7+35 X 0.733.5 X 2.7 -3.5 X 0.732.4 X 0.9 + 0.1 X 32..6 X 0.8 +0.2X7.69.16 X1.5-0.5X9 .16五、一些简算小技巧A 、巧借;可要注意还哦, 有借有还;再借不难.9999+999+99+94821-998B 、分拆;可不要改变数的大小哦3.2X12.5X251.25X88.6X0.25C/ 注意构造;让我们的算式满足乘法分配律的条件1.8X99 + 1.83.8 X9.9 +0.3.6 X9.913.5 X27+13.5X72+13.51.01 X9. 102 X0.83.5 X101 -3.5.5 X9.9.5 X99+3.50.67X10.1 -6.3.6 -3.6X0.50.85 X1990.25X8.5X428.6X101-28.62.4 X1020.25X3 0.125 X3.2X2.55X40.22.31 X 1.2 X 0. 15 - 0.2.5 X 2.4 X 40.20.125X8.80.25 X0.280.125 X3.2X2.528X21.6-2.8X16.6X1.7+0.56X83 请用简便方法计算下列各题0 .25 X 4-0.25 X 4.9 - 3.53.29+0.73+2.22.7 -457.325- 3.29- 3.3250.35 X1.25X2X0.83.29 X 0.25 X 3.4 - 2.5 - 0..9 - 1.414 -7.32 -2.62.64 +8.67 +7.36+11.33五年级上册简便算法题10-3.14 - 6.86 + 3.1437.68 -0.25 -43.75 -37.56 -0.77-144 .5X9.80.7-0.1250.7-0.252.5X3.2X12.512.5X9.6X0.253.75 -37.65-0.4-0.253.125-8-0.12537.65 -4.75 -3.2525X6.4X12.53.6X0.25答案10-3.14 -6.86-3.1=-3.1=3.14 -3.1=137.68-0.25-=37.68- =37.68 -1 =37.68 3.75 -=3.75 -2.75 +1.=1 +1.=2.337.56 =37.56 7.56 1=301=10.77 - 1=0.77 - 7- =0.11 - =0.054.5 X 9.8=4.5 X =4.5 X10 — 4.5 X 0.=45 —0.=44.1 0.7 - 0.125=* =0.56 * 1 =0.50.7 * 0.25=+ =2.8 * 1 =2.82.5X3.2X12.=X =1X100 =10012.5X9.6X0.25=X3X =10X3X1 =303.75 —=3.75 +1.25—2.8=5 —2.=2.237.65*0.4*0.25.125 *8*0.1257.65 — 4.75—3.225X6.4X12.=25X4X0.2X8X12.5.6 X0.2=X0.25.4*9+5.6*=。
小学数学五年级上册简便计算68道题(含详细规范标准答案)
小学数学五年级上册简便计算68道题(含详细规范标准答案)一、加减法简便计算1. 123 + 456 = 5792. 789 321 = 4683. 678 + 123 456 = 3454. 456 + 789 123 = 11225. 987 + 654 321 = 13206. 789 + 456 123 = 11227. 654 + 321 987 = 3128. 321 + 987 654 = 6549. 123 + 456 + 789 = 136810. 456 + 789 + 123 = 1368二、乘除法简便计算11. 7 × 8 = 5612. 9 ÷ 3 = 313. 12 × 13 = 15614. 15 ÷ 5 = 315. 18 × 19 = 34216. 21 ÷ 7 = 317. 24 × 25 = 60018. 27 ÷ 9 = 319. 30 × 31 = 93020. 33 ÷ 11 = 3三、混合运算简便计算21. 12 + 7 × 8 = 6822. 9 ÷ 3 + 6 = 723. 12 × 13 45 = 14124. 15 ÷ 5 + 8 = 725. 18 × 19 + 21 = 35726. 21 ÷ 7 4 = 127. 24 × 25 12 = 58828. 27 ÷ 9 + 3 = 629. 30 × 31 15 = 91530. 33 ÷ 11 2 = 1四、分数简便计算31. 1/2 + 1/3 = 5/632. 2/3 ÷ 1/4 = 8/333. 3/4 + 1/2 = 5/434. 4/5 ÷ 1/2 = 8/535. 5/6 + 1/3 = 7/636. 6/7 ÷ 1/4 = 24/737. 7/8 + 1/2 = 11/838. 8/9 ÷ 1/3 = 839. 9/10 + 1/5 = 13/1040. 10/11 ÷ 1/2 = 20/11五、小数简便计算41. 0.5 + 0.3 = 0.842. 0.6 ÷ 0.2 = 343. 0.7 × 0.8 = 0.5644. 0.4 ÷ 0.4 = 145. 0.9 + 0.1 = 146. 0.8 ÷ 0.2 = 447. 0.7 × 0.9 = 0.6348. 0.6 ÷ 0.3 = 249. 0.5 + 0.2 = 0.750. 0.4 ÷ 0.2 = 2六、百分数简便计算51. 20% + 30% = 50%52. 40% ÷ 20% = 253. 50% × 80% = 40%54. 25% + 75% = 100%55. 60% ÷ 30% = 256. 70% × 50% = 35%57. 80% + 20% = 100%58. 90% ÷ 10% = 959. 55% × 45% = 24.75%60. 65% + 35% = 100%七、方程简便计算61. 2x + 3 = 7,解得 x = 262. 3x 4 = 5,解得 x = 363. 4x + 5 = 9,解得 x = 164. 5x 6 = 4,解得 x = 265. 6x + 7 = 13,解得 x = 166. 7x 8 = 9,解得 x = 367. 8x + 9 = 17,解得 x = 168. 9x 10 = 11,解得 x = 3八、应用题简便计算69. 小华有10个苹果,小明有15个苹果,他们一共有多少个苹果?解:10 + 15 = 25个苹果。
小学数学五年级上册简便计算68道题(含详细答案)
小学数学五年级上册简便计算68道题(含详细答案)3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.80.25×0.28 0.125×3.2×2.5 35×10.2 0.25×4÷0.25×4 3.5×9.9 3.5×99+3.53.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7 (32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.4 7÷0.25÷4 7÷0.1257.35÷(7.35×0.25) 7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2 0.32×4033.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×3612.7-(3.7+0.84)36.54-1.76-4.54 0.25×0.73×47.6×0.8+0.2×7.6 0.85×199 0.25×8.5×41.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.350.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6(4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×10214-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5(2.5-0.25)×0.4 9.16×1.5-0.5×9.163.6-3.6×0.54.5÷1.8 930÷0.6÷5 63.4÷2.5÷0.4 4.25÷2.5×9.9+0.173.9÷(1.3×5)(7.7+1.54)÷0.72.5×2.4 2.7÷450.35×1.25×2×0.8 32.4×0.9+0.1×32.415÷0.25 15÷(0.15×0.4)小学数学五年级上册简便计算练习(答案卷)一、归类练习:3.29+0.73+2.27 3.29-0.73-2.27 7.5+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)7.325-3.29-3.325 7.325-(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+2.27 3.29×0.25×4 0.125×8.8=(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)0.25×0.28 0.125×3.2×2.5 35×10.2=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 3.5×9.9 3.5×99+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 =350(同级运算交换) =34.65 (乘法分配律)(拆数,乘法分配律)3.5×101-3.5 3.5×9.9+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。
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五年级上册数学简便计算练习题及答案请用简便方法计算下列各题
0.25×0.20.125×3.2×2.535×40.2
0.25×4÷0.25×4.5×9.93.5×99+3.5
3.5×101-3.53.5
3.5×2.7-3.5×0.7
4.9÷3.5
7.35÷.35
3.29+0.73+2.273.29-0.73-2.2.5+2.5-7.5+2.5
7.325-3.29-3.32.325-7.325-
×9.9+3.5×0.1.5÷0..5÷0.25÷÷7.325- ×2.7+35×0.7÷0.6-0.5÷0.÷0.12÷8
3.29+0.73-2.29+2.23.29×0.25×0.125×8.8
63.4÷2.5÷0..9÷1.4.9÷
÷0.7
0.35×1.25×2×0.8
28.6×101-28.6
14-7.32-2.62.64
×0.4
7.6×0.8+0.2×7.6
0.25×36
2.5×2.432.4×0.9+0.1×32.40.86×15.7-
0.86×14.7+8.67+7.36+11.39.16×1.5-0.5×9.163.60.85×19 ×3.2×2.552.7÷45
15÷0.252.4×102.31×1.2×0.5-3.6×0.0.25×8.5×4×40.2
0.125
小学数学五年级上册简便计算归类练习
一、当一个计算题只有同一级运算又没有括号时,我们可以“带符号搬家”。
12.06+5.07+2.90.34+9.76-10.3425×7×4
34÷4÷1. 1.25÷25×0.102×7.3÷5.1
二A、当一个计算题只有加减运算又没有括号时,我们可以在加号后面直接添括号,括到括号里的运算原来是加还是加,是减还是减。
但是在减号后面添括号时,括到括号里的运算,原来是加,现在就要变为减;原来是减,现在就要变为加。
a+b+c=a+ ,a+b-c=a +,a-b+c=a –,a-b-c= a-33-15.7-4.41.06-19.72-20.28.29+0.73-2.29+2.27
7.325-.29-0.73-2.27.325-.325-
B、当一
运算,原来是乘还是乘,是除还是除。
但是在除号后面添括号时,括到括号里的运算,原来是乘,现在就要变为除;原来是除,现在就要变为乘。
a×b×c=a×, a×b÷c=a×, a÷b÷c=a÷ ,a÷b×c=a÷,
700÷14÷ 18.6÷2.5÷0.1.96÷0.5÷1.06×2.5×4 7÷0.25÷÷0.12÷.9÷
三A、当一个计算题只有加减运算又有括号时,我们可以将加号后面的括号直接去掉,原来是加现在还是加,是减还是减。
但是将减号后面的括号去掉时,原来括号里的加,现在要变为减;原来是
减,现在就要变为加。
5.68+19.68-
B、当一个计算题只有乘除运算又有括号时,我们可以将乘号后面的括号直接去掉,原来是乘还是乘,是除还是除。
但是将除号后面的括号去掉时,原来括号里的乘,现在就要变为除;原来是除,现在就要变为乘。
0.25×1.25× .35÷
四、乘法分配律的两种典型类型
A,、括号里是加或减运算,与另一个数相乘,注意分配
÷0. ×0.4÷0.7
B、注意相同因数的提取。
0.92×1.41+0.92×
8.590.86×15.7-0.86×14.73.5÷0.6-0.5÷0.6
1.3×11.6-
1.6×1..5×9.9+3.5×0.1.5×
2.7+35×0.73
3.5×2.7-3.5×0.732.4×0.9+0.1×32..6×0.8+
0.2×7.69.16×1.5-0.5×9.16
五、一些简算小技巧
A、巧借,可要注意还哦 ,有借有还,再借不难。
9999+999+99+94821-998
B、分拆,可不要改变数的大小哦
3.2×12.5×251.25×88.6×0.25
C/注意构造,让我们的算式满足乘法分配律的条件
1.8×99+ 1.83.8×9.9+
0.3.6×9.913.5×27+13.5×72+13.5
1.01×9. 102×0.83.5×101-3.5.5×9.9.5×99+3.5
0.67×10.1-6.3.6-3.6×0.50.85×199
0.25×8.5×428.6×101-28.62.4×102
0.25×3 0.125×3.2×2.55×40.2
2.31×1.2×0. 15÷0.2.5×2.4×40.2
0.125×8.80.25×0.280.125×3.2×2.5
28×21.6-2.8×16.6×1.7+0.56×83
请用简便方法计算下列各题
0.25×4÷0.25×4.9÷3.5
3.29+0.73+2.22.7÷45
7.325-3.29-3.3250.35×1.25×2×0.8
3.29×0.25×3.4÷2.5÷0..9÷1.4
14-7.32-2.62.64+8.67+7.36+11.33 五年级上册简便算法题
10÷3.14-6.86÷3.14
37.68÷0.25÷4
3.75-
37.56-0.77÷14
4.5×9.8
0.7÷0.125
0.7÷0.25
2.5×
3.2×12.5
12.5×9.6×0.25
3.75-
37.65÷0.4÷0.25
3.125÷8÷0.125
37.65-4.75-3.25
25×6.4×12.5
3.6×0.25
答案
10÷3.14-6.86÷3.1=÷3.1=3.14÷3.1=1 37.68÷0.25÷=37.68÷ =37.68÷1 =37.68
3.75- =3.75-2.75+1.=1+1.=2.3
37.56-=37.56-7.56-1=30-1=10.77÷1=0.77÷7÷=0.11÷=0.054.5×9.8
=4.5× =4.5×10-4.5×0.=45-0.=44.1 0.7÷0.125
=÷ =0.56÷1 =0.50.7÷0.25
=÷ =2.8÷1 =2.8
2.5×
3.2×12.=× =1×100 =100
12.5×9.6×0.25
=×3× =10×3×1 =30
3.75- =3.75+1.25-2.8
=5-2.=2.2
37.65÷0.4÷0.25.125÷8÷0.1257.65-4.75-3.225×6.4×12.=25×4×0.2×8×12.5.6×0.2=×0.25.4÷9+5.6÷=。