(5又8分之3+18又2分之1-7又24分之6)*16又3分之2= (5 + 3/8 +18 +1/2 - 7 - 6/24 ) x 50 / 3 = (5 +18 - 7+1/2 + 3/8 - 1/4 ) x 50 / 3 = [16 + (4+3-2) /8] x 50/3= (16 + 5/8 ) x 50/3 = 133 /8 x 50/3= 133 /4 x 2...