Ответ:9 + 7 = 16.8 + 6 = 14.7 + 5 = 12.16 − 8 = 8.16 − 9 = 7.16 − 7 = 9.15 − 6 + 4 = 9 + 4 = 13.7 + 8 − 9 = 15 − 9 = 6.13 − 5 + 4 = 8 + 4 = 12.