文档介绍：12 13 15                                                48 21 10                                                        25 18 20                                                51 15 11                                                    27 22 15                                                         19 27 25                                                  5 4 7 8 9 15                                            11 15 25 16 5 10                                              3 16 8 21 9 16                                              15 21 27 8 9 35                                            11 15 27 68 33 38                                             17 20 21 26 9 40                                            19 39 10 63 34 36分数乘法计算练****题一、分数与整数相乘。5 6 11×4= 26× = ×5=13 2 324× = ×7= ×20=4 7 9×15= ×12= 16× =13 14 1017× = ×30= ×121=16 9 14×54= 11× = ×20=18 5 24×38= 36× = 100× =二、分数和分数相乘。(注意:能约分的先约分,再计算。)2 3 6 7 5 8× = × = × =9 7 12 15 4 9× = × = × =2 15 7 5 4 27× = × = × =14 25 20 3 7 18× = × = × =6 22 17 45 19 11× = × = × =8 17 13 7 8 27× = × = × =13 38 9 50 12 17× = × = × =16    63   7             5    16              643    12   15三、分数乘、加、减混合。7 50 2 4 15 5 3 2 5 4×( - ) × ×14 × +1 + ×13   )91   ×7+  89 5 27 18 38 614 -9 × 35 1 -19 × 45 15×(5-5191315   ×  726   ×5              ( +1114   × 17四、分数乘、加、减简便运算。13 58 12 )×24918 ×146   - )×36             99×  97( 513   -  749 989 9