найти значение выражение( 13 3/4-12 13/14 ) * 5 2/3 +2 2/5

(13 3/4 - 12 13/14) * 5 2/3 + 2 2/5 = (55/4 - 168/14) * 17/3 + 12/5 = (385/28 - 336/28) * 17/3 + 12/5 = (385 - 336)/28 * 17/3 + 12/5 = 49/28 * 17/3 + 12/5 = 7/4 * 17/3 + 12/5 = (7 * 17)/(4 * 3) + 12/5 = (7 * 17)/(4 * 3) + 12/5 = 119/12 + 12/5 = 595/60 + 144/60 = (595 + 144)/60 = 739/60 = 12 19/60Ответ: 12 19/60