395＋2508＋115
=395＋115＋2508
=510＋2508
=3018
1382－82×15
=1382－1230
=152
688－112－88
=688-（112+88）
=688-200
=488
153÷153＋219×3
=1+657
=658
﹙567－567﹚÷90
=0÷90
=0
451＋549÷3－95
=451＋183－95
=539
1000－645－345
=1000-（645+345）
=1000-990
=10
125＋75×180
=125+13500
=13625
540－240÷12
=540-20
=520
246÷9×6
=246×6÷9
=1476÷9
=164
680－202＋98
=680-200-2+100-2
=580-4
=576
234×98÷49
=234×2
=468
18×13×150
=18×150×13
=2700×13
=35100
630×33÷21
=630÷21×33
=30×33
=990
2236÷13÷43
=172÷43
=4
6300÷2÷63
=6300÷63÷2
=100÷2
=50
888－﹙88＋77﹚
=888-88-77
=800-77
=723