-72+3.5/8+(-0.75) 15+(-9.46)+(-23/50) -83.4+(-19.2/3)+(-14/15)

1) -72 + 3 5/8 + (-0,75) = -72 + (3 * 8 + 5)/8 - 75/100 = -72 + (24 + 5)/8 - 3/4 = -72 * 8/8 + 29/8 - 3 * 2/8 = -576/8 + 29/8 - 6/8 = (- 576 + 29 - 6)/8 = - 553/8.

Ответ: - 553/8.

2) 15 + (- 9,46) + (- 23/50) = 1500/100 - 946/100 - 23 * 2/100 = (1500 - 946 - 46)/100 = 508/100 = 5,08.

Ответ: 5,08.

3) - 83,4 + (- 19 2/3) + (- 14/15) = - 834/10 - (19 * 3 + 2)/3 - 14/15 = - 417/5 - 59/3 - 14/15 = - 417 * 3/15 - 59 * 5/15 - 14/15 = - 1251/15 - 295/15 - 14/15 = - (1251 + 295 + 14)/15 = - (1251 + 295 + 14)/15 = - 1560/15 = - 104.

Ответ: - 104.