第18页

信息发布者：

=258+142+195
=400+195
=595

=(78+222)+(248+452)
=300+700
=1000

=(678+322)+784
=1000+784
=1784

=(347+853)+(483+617)+700
=1200+1100+700
=2300+700
=3000

=479+200+2

=679+2

=681

=200-1+187

=200+186

=386

=49998+2+4998+2+48+2+498+2
=50000+5000+50+500
=55550

1000-(462+265+238)=35(元)
答：妈妈还剩35元。