1又2/3×[7又5/6+(4.125-4又1/8)-4又5/6] [(2/3+1/4)]×3/4]÷5/8 能简便就简便 晚上就要啊。。急急急

（2.25÷0.375×1/6-0.3×2又2/3）×（2.3×0.25+0.27×2.5）还有这一题

1又2/3×[7又5/6+(4.125-4又1/8)-4又5/6] [(2/3+1/4)]×3/4]÷5/8
=5/3 *【7又5/6+0-4又5/6] [(2/3+1/4)]×3/4]*8/5
=（5/3 * 8/5）【7又5/6+0-4又5/6] [(2/3+1/4)]×3/4]
=8/3*【3(2/3+1/4)×3/4】
=8/3 *3(2/3+1/4)×3/4
=（8*3/4）(2/3+1/4)
=6(2/3+1/4)
=4+ 3/2
=5又1/2

（2.25÷0.375×1/6-0.3×2又2/3）×（2.3×0.25+0.27×2.5）
=（9/4 * 8/3 *1/6 -0.3* 8/3）*（ 2.3*0.25 +2.7* 0.25）
=（1-0.8）*（2.3+2.7）*0.25
=0.2*5*0.25
=0.25追问

那个。。1又2/3×[7又5/6+(4.125-4又1/8)-4又5/6] 和[(2/3+1/4)]×3/4]÷5/8 是两道题

追答

1又2/3×[7又5/6+(4.125-4又1/8)-4又5/6]
=5/3 *【7又5/6+0-4又5/6]
=5/3 * 3
=5

[(2/3+1/4)]×3/4]÷5/8
=[(2/3+1/4)]×3/4 * 8/5
=[(2/3+1/4)]×6/5
=2/3 * 6/5 + 1/4 *6/5
=4/5 +3/10
=8/10 +3/10
=11/10
=1又1/10

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