六年级数学练习——专项练习二(简便运算之提公因式法).doc

专项练习二（简便运算之提公因式法）(1)3.1443723.141500.314(2)2.285.264.561.1311.40.496(3)5.88250.324.282532%(4)（7.59.9750.167500.015）（12-13）6(5)(78.60.7862575%21.4) 152015(6) 4317.4837-174.81.9+1.748820(7)4937516251374962(8)201320142014201420132013(9) 3352345555525252654.336(10) 712+524-2372-257.4+0.45.2-40%2.6(11) 76123-153+23153+176-123-17653(12) 22745+2296.2-5.8229-15229920(13) 927+72957+59(14) 4827-4817+486734-512+18(15) 35+12-7126037-6017+6057(16) 135111313+41115313-11131325(17) 49791617+4019+19417+33149112(18) 361923+634230.125+1263423+6342338(19)123+369+71421135+3915+72135(20)123+246+369+153045234+468+6912+304560