178×101-178=178x（101-1）=178x100=17800
83×102-83×2=83x（102-2）=83x100=8300
17×23-23×7=23x（17-7）=23x10=230
158+262+138=420+138=558
375+219+318+225=594+318+225=912+225=1137
（181+2564）+2719=2745+2719=5464
7788-（2187+775）=7788-2962=4826
2365-1086-214=1279-214=1065
3065-738-1065=2327-1065=1262
12×25=3x4x5x5=15x20=300
75×24=3x25x24=3x600=1800
138×25×4=138x100=13800
7300÷25÷4=292÷4=73
24×25=4x6x5x5=20x30=600
88×125=(80+8)x125=10000+1000=11000
35×127-35×16-11×35=35x(127-16-11)=35x(111-11)=35x100=3500
102×76=7752
178×101-178=17978-178=17800
75×99+75=7425+75=7500
8100÷4÷75=2025÷75=27
84×36+64×84=84x(36+64)=84x100=8400
83÷102-83×2=83÷(102-1/2)=83÷101.5=83/1015
25×32×125=800x125=100000
400+612÷12×4=400+51x4=400+204=604
118+153÷17×9=118+9x9=118+81=199
（374-265+238)×64=（109+238）x64=347x64=22208
21×(230-192÷4)=21x（230-48）=21x182=3822
118+306÷17+265=118+18+265=136+265=401
540÷45×(65+35)=540÷45x100=12x100=1200
325÷13×(266-250)=325÷13x16=25x16=400
(328+198÷9)÷70=（328+22）÷70=350÷70=5
65+260÷4×98=65+65x98=65x（1+98）=65x99=6435