[(2/1+3/2)÷6/5-3/1]÷7/1-3/1 =【6/7×5/6-3/1】×7-3/1=【5/7-3/1】×7-3/1=15/16×7-3/1=（1+15/1）×7-3/1=7+15/7-3/1=7又15/23.6×14.4+9.3×32+3.21×36 =3.6×14.4+32.1×3.6+9.3×32=3.6×（14.4+32.1）+9....58×7/3＋12÷2又3/1怎么做 我赏你分58×7/3＋12÷2又3/1=58×7/3+12×7/3=（58+12）×7/3=70×7/3=10