а)
5/16 (9 - 2 1/7)
5/16 (63/7 - 15/7)
5/16 * (48/7)
240/112
30/14
15/7

б)
(8.8 / 1.6 - 3.05) 1.4
(5.5 - 3.05) 1.4
2.45 * 1.4
3.43