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五年级下册数学简便算法带答案

例1、5.76+13.67+4.24+6.33 =(5.76+4.24)+(13.67+6.33) =10+10 =20 例2、37.24+23.79-17.24 =37.24-17.24+23.79 =20+23.79 =43.79 例3、 4×3.78×0.25 =4×0.25×3.78 =1×3.78 =3.78 例4、 125×246×0.8 =125×0.8×246 =100×246 =24600...

(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10 (5)12.5×7.4×0.8 =12.5×0.8×7.4 =74 (6)6.5×9.5+6.5×0.5 =6.5×(9....

简便计算题: 1)6.9+4.8+3.1 0.456+6.22+3.78 2)4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75—6.48) 3)3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2 4)3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47 5)5.27...

(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10

五年级奥数题计算题 1、0.2008+2.008+20.08+200.8+2008 =0.2008×(1+10+100+1000+10000) =0.2008×11110 =2230.888 2、1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷……÷(2007÷2008)=1×3/2×4/3×5/4×6/5×……×2008/2007 =2008 3、1+1/3+1/6+1/10+……+1/2009×...

0.89×100.1 146.5-(23+46.5) 3.83×4.56+3.83×5.44 4.36×12.5×8 9.7×99+9.7 27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 0.65×101 3.2×0.25×12.5 (45.9-32.7)÷8÷0.125 3.14×0.68+31.4×0.032 5.6÷1.25÷0.8÷2.5÷0.4 7.2×0.2+2.4×1.4 8.9×1.01 7.74×(2....

在网上寻找具体的参考书上的答案是很难的,在网上是问不到答案的哈 还是自己多思考,不会的找同学询问 大家讨论,对自己是有好处的

*是乘号 /是除号 0.3*2.5*0.4 50*0.13*0.2 0.8*630*0.125 0.78*101 1.5*102 9.8*25 1.2*2.5+0.8*2.5 1.25*0.7*0.8 0.038*5*2.1 3.8+4.5+6.2 93/0.31/3 3.25-0.84-0.16 88*0.25*4 2.8*3.6+1.4*2.8 63*10.1 (3.2+0.128)/0.8 9.83*1.5+6.17*1.5 ...

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

1.1995×1996.1996-1996×1995.1995 2.2003×200220022002-2002×200320032002 3.111111÷1111×3333 4.19961997×19971996-19961996×19971997 5.77×13+255×999+510 5.11111111112222222222÷3333333334 6.2772÷28+34965÷35 7.2222×100002+66666×6666 1...

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