8+1.1*（8*1.25）= 8+1.1*10 =19 或者是 8+（8+0.8）*1.25 =8+10+1 = 19
=8+1.1*8*1.25=8+1.1*10=19
8+8.8×1.25=8+（8+0.8）×1.25=8+8×1.25+0.8×1.25=8+10+1=19
=8+（8+0.8）*1.25=8+8*1.25+0.8*1.25=19
