oblicz i zapisz obliczenia   4,5*8/5-4,5*(-0,8) -3/8:15-0,125:15 19/53*2 3/5-2,6*19/53   legęda: *-razy /-liczba ułamkowa

1) 4,5 *8/5 - 4,5 * (-0,8)= =4½ *8/5 - 4,5* (-0,8)= =9/2 * 8/5 + 3,6= =36/5 +3,6= =7,2 + 3,6= =10,8   2) -3/8:15 - 0,125:15= =-3/8*1/15 - 1/8*1/15= = -1/40 - 1/120= = -3/120 - 1/120= = -4/120 = -1/30   3) 19/53 * 2 3/5 - 2,6 *19/53= = 19/53 * 13/5 - 2 1/6* 19/53= = 247/265 - 13/6*19/53= = 247/265 - 247/318= = 1482/1590 - 1235/1590= = 247/1590