Ответ:\(42 + 14 = 56\);\(99 - 66 = 33\);\(27 + 48 = 75\);\(31 + 17 = 48\);\(3 \cdot 7 = 21\);\(3 \cdot 9 = 27\);\(16 : 2 = 8\);\(21 : 3 = 7\).