分数运算练习题：乘法、简便运算、混合运算

计算结果如下： (1/3) x (2/5) = 2/15 (2/7) x (3/4) = 6/28 = 3/14 (5/6) x (1/2) = 5/12 (3/8) x (4/9) = 12/72 = 1/6 (4/5) x (2/3) = 8/15 (2/9) x (1/4) = 2/36 = 1/18 (6/7) x (3/5) = 18/35 (1/2) x (3/4) = 3/8 (4/5) x (1/2) = 4/10 = 2/5 (2/3) x (3/4) = 6/12 = 1/2

计算结果如下： (2/3) x 5 = 10/3 (3/4) x 6 = 18/4 = 9/2 (4/5) x 3 = 12/5 (1/2) x 4 = 4/2 = 2 (3/8) x 7 = 21/8 (5/6) x 2 = 10/6 = 5/3 (2/7) x 8 = 16/7 (1/4) x 9 = 9/4 (6/7) x 2 = 12/7 (2/9) x 10 = 20/9

计算结果如下： 4 x (1/2) = 8/2 = 4 3 x (2/5) = 6/5 5 x (3/4) = 15/4 2 x (4/9) = 8/9 6 x (5/6) = 5 7 x (1/4) = 7/4 1 x (3/5) = 3/5 8 x (2/3) = 16/3 9 x (1/2) = 9/2 10 x (3/4) = 30/4 = 15/2

计算结果如下： (1/3) x 0.2 = 0.2/3 = 1/15 (2/7) x 0.4 = 0.8/7 (5/6) x 0.5 = 2.5/6 = 5/12 (3/8) x 0.1 = 0.3/8 = 3/80 (4/5) x 0.3 = 1.2/5 = 6/25 (2/9) x 0.8 = 1.6/9 (6/7) x 0.6 = 3.6/7 (1/2) x 0.4 = 0.4/2 = 2/5 (4/5) x 0.7 = 2.8/5 = 14/25 (2/3) x 0.9 = 1.8/3 = 6/10 = 3/5

计算结果如下： (1/2) x 3 + 2 = 3/2 + 4/2 = 7/2 = 3.5 (2/3) x 4 - 1 = 8/3 - 3/3 = 5/3 (3/4) x 5 + 2 = 15/4 + 8/4 = 23/4 (4/5) x 2 - 3 = 8/5 - 15/5 = -7/5 (5/6) x 6 + 1 = 5/1 + 1 = 6 (1/3) x 9 - 2 = 9/3 - 6/3 = 3/3 = 1 (6/7) x 7 + 3 = 6 + 3 = 9 (2/9) x 8 - 4 = 16/9 - 36/9 = -20/9 (3/8) x 7 + 5 = 21/8 + 40/8 = 61/8 (4/5) x 10 - 6 = 40/5 - 30/5 = 10/5 = 2