34分数简便运算(1)5557221417(10)—一 X-(11)X—+—(12)X23+X23-2379716993131⑴2X4X141372)31X—563) 1336X—X——1482684⑷(9+27}X275) (I-4)X20⑹7X(7+叫111—+—X—15325 55141(8)-X—+—X—(9)X7+X6 99655(13)2017X201520^(14)1998X20162017(15)136X(18)7x12l31326)111111+++++1220304256727911131517^_20+30_42+^_72《巩固练习》24515724)29)157X2216)26-x135(17)415x85819)5997x+x——1724172411（20）方 x668+x-191319(21)139x 旦+137x13822)11++2x33x411+.…+4x59x101111(23)而+好+茹+…+17x19(18)7x12l31326)_x—x10(27)—x_x24(28)-x_x652112469(30)9xI59 x(44)»59323(31)x—+—x0.6454(32)叫+*.235(33)(4+g)x3234)(2+3—[)x1234235)(36) 1113111313x3377(37)—x101——252539) 46X4445(40)2008x2006(41)36 乂善(42)34x2531(43)14-x-4243——x95(20+45)4535X—+—X—797946)12x(1112A)17X248)1/x1647)(7+9)X£48)一x8一9分数乘法分配律练习（一）x60(2+I)x18189)x5849+27)x2727+30615（|+1）X2552557X6+12X6（6+2）93分数乘法分配律（二）4636555133327XI3+7X136X9+9X64X5+4X52235327X4+27X4）X1247-5）X2020555（6-9）X1875312X（24+6+4X（3+17）（5+7）X354635X3+5X52X7+2X521X3+4X2178873377分数乘法分配律（三）63x101100爲 x78527x28”3436x3521xA21x2037x3533xZ+±X338111180.92x1.41+0.92x8.5916x7-3x7A_A5135131.3x11.6－1.6x1.3£x11.6+18.4x£5513x128)x7x989625x243434x35527 x262931x302728 x27445x1°25gx83#x2.5)x7x5分数乘法分配律（四）)x5x12(6-I)x6x18(21(20+5)x5x4+27)x27x3(20+3)x20x83x12x(3-1)(3+4)x25612xil+6分数乘法分配律(五)124+3)x24)x6x106x5x2730x(辽+30))x6077x101-335x99+577历 x101-(20+3)x20x83x12x(3-1)(3+4)x25612xil+62x7+50.92x99+0.92881.3x11－1.3lx19+9334x19+4分数乘法结合律和交换律（六）1x1x52xlx34x5x18563494x7x5Ix16x21Axlx14598751375517x9+923x3+J14xZ-Z1313?xl3+5772x20+23312xT36+13x125x34）5x4x46x21642+4x6分数混合计算（七）17x27x275217Mx25x5322255x10x65x7x5x5x6（1+25）x255211-Mx25x125x34）5x4x46x21642+4x66x（5-2）5x 茶 105467-9x4+5)x55x4+313783x(4+新 N6+1)I-氓分数乘法简便运算(一)1x3+4Zx6+_!1212i-7xW251 +(冬 4)245)x60U+I)x18189(6-5zI4 勺+27)x2727l1I+301.3x11.6—1.6x1.39X11.6+18.4X255IX3+IXI?X7+?X521X1+1X2178873377625X243434X35T3X12445X1025#X843|X2.5135+7)X7X571(12-5)X5X12(6-I)X6X18分数乘法简便运算（二）4x7x5£x16x 21_£xlx1459875137232745x4x46x(18x30)17x(125x34)7710x101-1077历 x101-TU(7+8)x7x9)x5x4849+27 )x27x35x99+51+5100612X13+6135X7+5880.92x99＋0.926X(7-2）(5+21)X25525]5211-而X25162+4X46X(5-2)2295X!U+63X101分数乘法简便运算（三）677x78527 x281.3x11—1.39x19+914xZ-Z1313(20+3)x20x83x12x(2-1)(|+4)x251x9x(7+3030x(T8+30)x105x13+977?x20+?3312x6613+!323X3+3334X19+4分数乘法简便运算(四)(|+7)X3I4637F+7XT355516X9+9X63335517X9+9712X(24/153(24-86152X(6+2)93(I+25)x223X3+324X5+4XI4636x13x133-X^+_lx33811118849x27x27521732x5714x25x54x52255x10x65x43x53x5x67-4x4】一 5x251 +（£xl）245Zx6+_£12125x4+313781x3+423X3+3
