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1、.小学数学四则运算简便运算大汇总 简便运算 431+3.2532+6.8 25(80.4)1.25 7154(2154231)(1211187+245)72 93.532172 1125997 998+1246+9989 （870087087）87 1258.8 1.34.253.73.75 17.15（3.52.85）3.4993.4 4.81.01 0.4（2.573）（1.61.61.61.6）25 （9465187）361 71100257 12.32.455.74.55 9725111592 0.1250.2564 .64.2870.6421300 78367.8741754 211
2、31712178 87210.125210.5 2.4243+4.5831143 251002625 4.25365(261143)3.83.93.90.10.13.9 12.1(151+211)105 )37.125.8(63.975.4 )38.648.2(17.348.7 511)9518.3(957 41666617907921333387 7.21111.07.09999.0 3.672.109.136 8.562.108.148 5269.375225533 2.33.198.168.6 5.186.678.515.818.155.81 .3.541352.422351.12235
3、 4123341223411234 8124668124468122468112468 34-（15+13）98 25 34-12 4 58 1（34+13）16-（514-13）79 57+98 59+38 1-58 2528-310 14 37+47 4 5-（67 314+613）435252 12614121 15141781714159 10713151321 .425-（2.5+1.9）(0.5-0.5)425-2.5+1.9(0.5-0.5)425-2.5+1.90.5-0.5 425-(2.5+1.90.5)-0.5 425-(2.5+1.9)(0.5-0.5)425-(2.5
4、+1.9)0.5-0.5 1213-412-214-518-12.5%0.12534+18 8.25+12.5%(78+1316)1316 2.537 0.4213 15314-2.25-734 89 1516+(716-14)12 10(45-0.5)37 (2.7-4.2525)2.847 1.25+114 7.4+125%58 10-4.687.2+0.05 .157(556-56 5)18.09(1.5+223)3.75-23 0.840.3(1.9618.9)56-(0.15+920)1.8 1325+5401815 2.58+9.518+40.125 2.1+7(3112-1.62
5、5)123 2.525-2.113+9.63 (713+713 2+713)4 3.8+1314+6.2+327 27(413-3.5)58 (234+23-156)12 2.58+3.518+0.125 (9.5+912+912+9.5)1212 313-(157+18 134)125 (0.05+14)0.25-25 125%382+498 381382 498-116 5.350.25+2.6514 (313+34-258)(115 80%)(4.20.7+6125)526 .0.832.512.5 7.69.90.01 8.320.58-0.320.58 1.255+0.2520 10
6、.69-2.52.4 0.32.50.04 8.457+8.442+8.4 130.652 7.210.1-7.2 1.22.5+2.82.5 320.653.23.5 9816515 25(4+254)60(125+154-21)4150.35+0.65154 0.2537.5%+8541 25%3117+311425%11291217219 .4150.350.65154 52452 321+3165 585-855 213626932 125810001258 （5131）15 5391529 325485 75657261 151（31121）41（3135138）6592403 （4
7、1+75）28 5343+5341 .,41.0619.7220.28 752383+83 874+29595 1132+752+353 700145 18.62.50.4 1319171917 2927132713 5.68（5.394.32）19.68（2.979.68）7172+(185172)576(8371)1.25（80.5）0.25（41.2）1.25（2130.8）0.74(7110074)24(1211-83-61-31)(12+72)7 （753-2019）385 9.3(493100)0.921.410.928.59 516137-53137 1.311.61.61.3 5911.618.459 9999+999+99+9 4821-998 3.212.525 1.2588 .7.60.25 3.50.125 3.89.90.38 257103-2572-257 （138）125 37002185815 20（175）47253 14205 25（4032）（57）80 4925 8141256 162554 259468741532 2345 40735 25645 25（64）（86）125 1027.35.1 3.60.25 2.69.9 1.062.54 .