4/3×括号5/6-1/2括号乘上9/8简算解：采用结合律，原式=4/3x（5/6-1/2）x9/8=4/3x9/8x（5/6-3/6）=3/2x3/6=3/2x1/2=3/4
运用乘法结合律和分配律：4/3×（5/6-1/2）×9/8＝（4/6×9/8）×（5/6-1/2）＝3/4×（5/6-1/2）＝3/4×5/6-3/4×1/2＝5/8-3/8×＝1/4
