Ответ:12 + 14 + 15 + 13 + 16 = 70.70 : 5 = 14.4 · 18 = 72.72 − 12 − 17 − 21 = 60 − 17 − 21 = 43 − 21 = 22.(8 + 10 + 7 + 9 + 11) : 5 = 45 : 5 = 9.