Question

617. Найдите значение выражения: 1) (-5/8)•(-4/5)•(-3/4)•(-2/3)•(-1/2) 2) (-7/12) •(-6/7)•(-5/6)•(-4/5)+2/3 3)(-11/15)•(-10/11)•(-9/10)+(-7/9)•(6/7)+4/15
дам 100 баллов​

Answer 1

Пошаговое объяснение:

№1

-5/8 * (-4/5) * (-3/4) * (-2/3) * (-1/2) = 4/8 * 2/4 * (-1/2) = 2/8 * (-1/2) = -2/16 = -1/8

№2

-7/12 * (-6/7) * (-5/6) * (-4/5) + 2/3 =

6/12 * 4/6 + 2/3 = 4/12 + 2/3 = 1/3 + 2/3 = 3/3 = 1

№3

-11/15 * (-10/11) * (-9/10) + (-7/9) * 6/7 + 4/15 =

10/15 * (-9/10) + (-6/9) + 4/15 =

-9/15 - 6/9 + 4/15 = -3/5 - 2/3 + 4/15 =

-9/15 - 10/15 + 4/15 = -19/15 + 4/15 = -15/15 = -1

Answer 2

Ответ:

Пошаговое объяснение:

1)

-5/8 * (-4/5) * (-3/4) * (-2/3) * (-1/2) = 4/8 * 2/4 * (-1/2) = 1/4 * (-1/2) = -1/8

2)

-7/12 * (-6/7) * (-5/6) * (-4/5) + 2/3 = 6/12 * 4/6 + 2/3 = 4/12 + 2/3 =

= 1/3 + 2/3 = 1

3)

-11/15 * (-10/11) * (-9/10) + (-7/9) * 6/7 + 4/15 = 10/15 * (-9/10) + (-6/9) + 4/15 =

= -9/15 - 6/9 + 4/15 = -27/45 - 30/45 + 12/45 = -57/45 + 12/45 =

= - 45/45 = - 1