(1,2-1 7/15)*( -5/8)-1 1/6: 2 1/3 решить - вопрос №121715581162137346299 от kamakina 11.07.2021 16:54

Question

Математика: (1,2-1 7/15)*( -5/8)-1 1/6: 2 1/3 решить

kamakina · Answer

1)1,2-1 7/15= 1 2/10 - 1 7/15 = 6/5 - 22/15 = (6 × 3 - 22 × 1)/15 = 18/15 - 22/15 = - 4/15
2) - 4/15 × ( - 5/8) = 20/120= 1/6
3) 1 1/6 : 2 1/3 = 7/6 : 7/3 = 7/6 × 3/7 = 1/2
4)1/6 - 1/2 =(1 × 1 - 1 × 3)/6 = 1/6 - 3/6 = - 2/6 = - 1/3
ответ: - 1/3