1、分分数数乘乘除除法法计计算算练练习习卷卷含含答答案案 姓名_ 一一、直直接接写写出出得得数数。 4 3 7 5 7 9 9 7 3 4 5 6 2 15 7 5 4 3 9 8 1 6 5 38 15 20 19 2 3 10 9 1 5 1 6 = 4 7 1= 19 53 0= 8 7 8= 9 7 63=1.8 6 1 = 5 2 10 9 6 5 = 15 17 60= 二二、计计算算,能能简简便便的的要要简简便便。 (8 9 + 4 27 )39(3 8 - 3 8 ) 6 15 1 6 (7 - 2 3 ) 5 6 5 9 + 5 9 1 6 2 9 3 4 + 5 27 3 4
2、6 13 7 5 - 6 13 2 5 7 12 6 - 5 12 6 3 8 +3 8 4 7 +3 8 3 7 37 3 35 6 25 24 15 21 3 4 + 10 21 3 4 - 3 4 7 10 101- 7 10 5 1 2 1 10 1 5 7 5 35 8 7 7 4 8 7 7 3 9 1 9 2 9 1 9 7 6 5 20 5 3 12 5 9 4 12 5 9 5 11 5 9 2 5 11 9 7 3 4 157 4 3 578 3 4 265 8 8 3 8 8 3 12 1 9 1 7 1 12 5 9 5 7 5 6 . 0 3 5 2444 5 3 3
3、 5 33 6.8 5 1 5 1 3.2 101 25 4 166 20 1 41 4 1 39 + 4 3 25 + 4 26 13 3 1 17 4 (2 3 2 - 4 3 )+ 15 12 1 21 17 20002000 2001 2000 199419921993 119941993 3 5 3 25 5 2 + 37.96 5 2 (9 7 2 +7 9 2 )( 7 5 + 9 5 ) 参参考考答答案案 一、 28 15 81 49 5 8 21 2 3 2 6 5 8 3 5 3 5 6 7 4 07 810.3 10 3 68 二、310 18 195 9 36 116
4、13 1 4 3 3 35 6 5 25 19 7 1 70 7 1 7 7 1 7 8 5 12 2 1 5 12 11 5 750 645 602 16 25 4 166 20 1 41 = (164 + 20 41 ) 41 1 = 164 41 1 + 20 41 41 1 = 4 20 1 4 1 39 + 4 3 25 + 4 26 13 3 = 4 3 13 + 4 3 25 + 4 3 13 26 = 4 3 (13 + 25 + 2) = 4 3 40 = 30 1 17 4 (2 3 2 - 4 3 )+ 15 12 1 21 17 = 17 21 1 12 11 + 15
5、 12 1 17 21 = 17 21 (1 12 11 + 15 12 1 ) =21 20002000 2001 2000 = 2000 2001 200020012000 = 2000 20022000 2001 = 2002 2001 199419921993 119941993 = 199419921993 11994) 11992( = 199419921993 199319941992 = 1 3 5 3 25 5 2 + 37.96 5 2 = 3 5 3 25 5 2 + (25 5 2 +12.5)6 5 2 = 3 5 3 25 5 2 + 25 5 2 6 5 2 + 12.56 5 2 = (3.6+6.4)25.4 + 12.580.8 = 254 + 80 = 334 (9 7 2 +7 9 2 )( 7 5 + 9 5 ) = ( 7 65 + 9 65 )( 7 5 + 9 5 ) = 65( 7 1 + 9 1 )5( 7 1 + 9 1 ) = 655 = 13