分数乘除法-简便计算.docx

文档介绍：分数乘除法简便计算(7-1)X60 (‘12 5丿89)X18- 5)X189丿5(2+1)X5‘20 5丿8 4(9+27)X277+30)16X73X7513513X-X3+5X7+2X5 213X3+4X21625X2434343513X125-9)X6X184341345x10258X835X(5+7)X7X58)X7X921—+20 5)X5X4(9+27)X27X3399+5X16X215 45X4X14137(12)X5X122187X30)10X101-10126X+136133 21(3+25)X251-710X101-10100X101§1421X—25177778(12534)14X1;-713126X(5-3)X11—22+5 109 99X19+95910232(20+3)X20XX12X(3-3(5+4)X253(52+—252 76X5X(18+30)302 7X(18+307(12-1-)X605175X-+95 55X13+57 7X20+23126x—13'13225X106XX2369X16615X300-+,)「x355x-x-5 7丿751775312x(方++3)65X4+35X341363—+-137463637437x—+x—3x—+x3x+x**********X27X27521732554314X25X54X5X-713X—7+85461521—-—X————X7947255 4 7 5|+( 5 X 4 ) / X 6+54 5 12 12