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1、 小数混合运算专项训练1、解方程。（1）5x450（2）12（6x）42（3）1.26+4x12（4）8.5xx22.5（2）3610.12、用简便方法计算。（1）0.25 3.212.5（3）0.2544（4）22.24+17.843、用递等式计算。（1）2.6+1.41.51.5（2）（373.64.8）12.5（4）15.616（0.25+1.25）（3）2.6+2.4（1.41.05）30.814-(9.85+1.07)2.8810.43-0.243.528-(3.4+1.252.4)60-(9.5+28.9)0.1820(2.44-1.8)0.4+0.152.557.1+2.457.
2、17779+111130.815.5-(3.21+5.79) (31.8+3.24) 50.64257.8+2.236.254.259.9242.42.50.831.54(6+3)22.5+2.5251807056(4121+2389)767115-97446912+149219.46.12.35.670.2-0.620.78+5.436+118.10.92+3.934. 8 54+140.40.70.259. 9x56+5610. 34x89-1320. 3x29+137.20.8-1.252.557.1+2.457.114. 31x56-5616. 59x18-14x2736. 178-1
3、4556+4228-(3.4+1.252.4)（31.8+3.24）535. 95（64-45）6.5（4.8-1.24）7779+11113 31.54(6+3)0.64257.8+2.236.724.259.9(4121+2389)722.5+2.525180705667115-97419464.81.80.9242.42.50.846912+1492405(3213-3189)18.10.92+3.930.78+5.436+119.46.12.30.04324+0.8754.070.86+9.1275-（12+18）5.670.2-0.620.40.70.2524078（154-115）
4、14372727563152160（83-79）1885(95144024)28084024532513(266250)1437272756358870(105202)37.85-（7.85+6.4） 3036(91327623)81432(135278)（947599）7664192（5438）67 81432(135278)2.8810.430.243.519464.81.80.9（947599）766460(9.528.9)0.180.815.5-(3.21+5.79)（31.8 3.24）536.724.259.93.416（0.01635）0.8(106.76)1.2 (6.8-6.
5、80.55)8.5 0.12 4.80.124.8（58+37）（64-95） 812-700（9+3111） 156(17.7-7.2)3（3.21.5+2.5）1.685+14（14+20826）3.2（1.5+2.5）1.6120-36418+359.721.6-18.3057（58+37）（64-95）(6.8-6.80.55)8.51.60.12 4.80.124.8（3.21.5+2.5）120-36418+3515-10.750.4-5.7347+452-416052（58+37）（64-95）（7.1-5.6）0.9-1.15 2.5 （3.21.5+2.5）1.65.42.6
6、（3.7-2.9）+0.62126（12-7.2）-63.26+（1.5+2.5）1.6（3.21.5+2.5）1.6120-14418+35347+452-416052（58+37）（64-95）95（64-45）812-700（9+3111）120-36418+35(6.8-6.80.55)8.50.12 4.80.124.80.815.5-(3.21+5.79)（31.8+3.24）531.54(6+3)0.64257.8+2.222.5+2.5219464.81.80.936.724.259.951807056242.42.50.8(4121+2389)767115-97446912+
7、1492405(3213-3189)0.8(106.76)1.219.46.1245.670.2-0.6218.10.92+3.9324+0.875990.40.70.250.75102100-56.2331.5016040（58+370）（64-45）32.120-14418+3533.347+452-41605234（58+37）（64-95）35.95（64-45） 36.178-14556+42420+580-64212837.812-700（9+3111）（136+64）（65-34523）38.85+14（14+20826）120-36418+35（58+37）（64-95）(6.
8、8-6.80.55)8.50.12 4.80.124.8（3.21.5+2.5）1.63.2（1.5+2.5）1.631.5016040（58+370）（64-45）32.120-14418+3533.347+452-41605234（58+37）（64-95）35.95（64-45）36.178-14556+42420+580-642128812-700（9+3111）（136+64）（65-34523）（284+16）（512-820818）120-36418+35（58+37）（64-95）(6.8-6.80.55)8.50.12 4.80.124.8（3.21.5+2.5）1.6（23.2（1.5+2.5）1.645.6-1.64=5.38+7.85-5.37=46.70.8-1.25=6-1.193-0.43=47.6.5（4.8-1.24）=0.681.9+0.321.9297999198321+213017(0.123+123) 10093424+34810.80.196+0.094105+8955732.4723+2739.0118.3-901 76.5+2-218449+231431995299+522532125
