（9.3×5/6-7.3）÷9/4
=（9.3*5/6-7.3)*4/9
=186/54-29.2/9
=(186-180-1.8)/54
=4.2/54
=7/90
3.14×1/3+3.14÷3/2
=3.14(1/3+2/3)
=3/14
8.13-（4.76-1.87）-2.24
=8.13+1.87-4.76-2.24
=10-7
=3
0.5+5/6×（0.15+9/20）
=0.5+5/6*12/20
=0.5+1/2
=1
98.47-（65.47-4.6）-4.6
=98.47-65.47
=33
3/4×2/7+0.25×2/7
=3/14+2/28
=4/14
2/3+（4/7+1/2）×7/25
=2/3+4/25+7/50
=2/3+3/10
=29/30
3/4×3/4+1/4×0.75-75%
=9/16+3/16-3/4
=3/16
（1-（1/4+3/8））÷1/4
=4-1-1.5
=0.5
46.2-46.2÷（4.9+2.8）
=46.2-46.2/7.7
=46.2-6
=40.2
（3618÷18-145）×29
=(201-145)*29
=56*29
=56*(30-1)
=1680-56
=1624
8/49×（（9/8-（3/7+1/8））
=9/49-8/49*31/56
=9/49-31/(49*7)
=32/343
7/9÷13/5+2/9×5/13
=7/9*5/13+2/9*5/13
=(35+10)/9*13
=5/13