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1、分数乘法的巧算（一）一、拆分因数，使计算简便。1、拆分分数：一个分数接近单位“1”（小于单位“1”或大于单位“1”）例：1.计算3334 27 2.计算2322 17 练习 1：4850 13 4341 13 3334 13 3938 25 2、拆分整数：整数接近分数的分母或接近分母的倍数例：1.计算 2010 12320092.计算93 2346练习 2：52 37501001 1011002199 89994365 129 二、先分拆分数，然后运用乘法分配律进行简便运算。1、分母相同的，拆分成一个分数与另一个因数的积的形式，再运用乘法分配律进行计算例：1.计算34 27+14 39 2.计
2、算57 27-27 29 练习 3：16 45+56 15 57 19 8 472、将一个带分数拆分成整数加分数的形式，再运用乘法分配律进行计算例：计算1531117445749精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页，共 4 页 -练习 4：2137152915563429911291667作业（一）2728 15 1002 100100135 31+15 7 262315作业（二）22311173842 43 13 45+23 15 3940 13 131 386557 9 476 作业（四）1738 37 103 1510457 5+47 6 251778二、乘法分配律的进一步
3、运用例 1：计算 5275+457923练习 1：33525 25+379106253384+55853510494 249 712例 2：计算 2217+1127+337211练习 2：3914+2534+264313938+15185435精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页，共 4 页 -文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z
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7、5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2
8、J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:
9、CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10
10、HI5Z6J8N4R1 ZE2J1H8I6B50.7149+234 15+0.7 59+14 15 935+241511538作业（一）（325+523+635+613）（3 311）161445+171778+1315566257+33510132215+1125+335211作业（二）（449+856+759+716）（3 314）191556+1919892513344251025+179105353917+2537+267313作业（三）（1227 235 325+1757）（8 38）71556+13 1223+2225577584+438 5359313+15113101335精品
11、资料-欢迎下载-欢迎下载 名师归纳-第 3 页，共 4 页 -文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6
12、J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H
13、8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4
14、D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5
15、Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J
16、1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:C
17、L4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5专题训练：例 1：计算12+14+18+116+132+164+1128巩固练习：12+14+18+116+132+16412+14+18+116+132+164+1128+1256分数乘法的巧算综合作
18、业：计算下面各题14950 12 3839 40 58 15+38 23 29788+867 7+7566+6455 7961759+119517+5019999+1002100010011002 3200120032002+200220042003+400520022003精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页，共 4 页 -文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:C
19、L4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 H
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23、 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1
24、ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5文档编码:CL4D6S1B5K10 HI5Z6J8N4R1 ZE2J1H8I6B5