五年级数学下册3.3《分数乘法(三)》练习题(无答案)北师大版.doc

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1、1分数乘法分数乘法(三) 1根据算式涂一涂,并算出结果。 83 2辨一辨。(对的打“” ,错的打“”) (1) 9512 12 。 ( )(2)3 米的 1和 1 米的 5一样长。 ( )(3)两个因数的积一定大于每个因数。 ( )(4) 4小时的 是 2小时。 ( )3比一比。在“”里填上“” 、 “”或“” 。922 43518 6518 1 4算一算。 10 163 97 32 5 8585 6 0 45. 解决问题。(1)一头鲸长 7 米,头部占 52,这头鲸的头部长多少米?(2)一块地有 6公顷,我修了这块地的 31,我修了这块 94。它们各修了多少公顷?(3)五年级收集废旧电池 1

2、80 节,其中 是一班收集的, 52是二班收集的,两个班各收集多少节?(4)校园举行“八荣八耻”演讲比赛,获得一等奖人数占参赛总人数的 1,其中获一2等奖的男生占一等奖总人数的 85,获得一等奖的男生人数占参赛人数的几分之几?如果有 352 人参赛,那么获得一等奖的男生有多少人?6小明买了一本共 200 页的课外书,他第一天读了全书的 51,第二天读了余下的 41,第三天小明应从哪页读起呢?参考答案1. 41 涂一涂略。2.(1)(2)(3)(4) 3. 4. 5 7 82 15 5.(1)7 (米)(2)小松鼠: 63 5(公顷) 小猫: 65 94 2710(公顷)(3)一班:180 160(节) 二班:180 72(节)(4) 8 352820(人)6.第一天:200 540(页) 第二天:(20040) 4140(页)第三天:40+40+1=81(页)3

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