Вычислите:
1) -14/15 × 25/28 + (-36/37) ÷ (-6/37) ;
2) 26/27 × (-9/65) + (-100/101) ÷ 50/303 ;
3)-30/31 × 15/124 + (-16/21) × (-7/8) ;
4) (-51/58) ÷ (-17/25) - 25/27 × (-81/125)

1)-14/15 * (25/28) + (-36/37) / (-6/37) = -5/6 + 6=5 1/6

-14/15 * (25/28) = -5/6

(-36/37) / (-6/37) = -36/37 * (-37/6) = 6

2)26/27 * (-9/65) + (-100/101) / (50/303) = -2/15 + (-6) = -6 2/15

26/27 * (-9/65) = -2/15

-100/101 / (50/303) = -100/101 / (303/50) = -6

Извини , с остальными туплю сильно )