Решить: 1. ( -3 9/13 - 2 2/13) x 13/80 2. ( -5 2/11 - вопрос №8776086139132213138025211251183113 от 0mixa0 18.07.2020 09:03

Question

Математика: Решить: 1. ( -3 9/13 - 2 2/13) x 13/80 2. ( -5 2/11 - 2 5/11 ) : 83/11 3. ( -1 3/5 - 2 2/15) : ( -1 2/5) 4. ( - 2/9 - 5/9 ) : 14 5. 41 : ( -2 5/12 - 3 1/20)

0mixa0 · Answer

1. ( -3 9/13 - 2 2/13) x 13/80 =-5 11/13*13/80=-76/13*13/80=-19/20
2. ( -5 2/11 - 2 5/11 ) : 83/11=-7 7/11:83/11=-84/11*11/83=-84/83=-1 1/83
3. ( -1 3/5 - 2 2/15) : ( -1 2/5)=(-8/5-32/15):(-7/5)=(-24/15-32/15)*(-5/7)=
-56/15*(-5/7)=8/3=2 2/3
4. ( - 2/9 - 5/9 ) : 14=-7/9*1/14=-1/18
5. 41 : ( -2 5/12 - 3 1/20)=41:(-29/12-61/20)=41:(-145/60-183/60)=41*(-60/328)=
-2460/328=-7.5