计算下面各题,怎样简便就怎样算.①468×5+232×5 ②900÷25÷4 ③15.6-4.47-5.53+6.4 ④23.76-(5.76-4.23) ⑤19×96+962÷74 ⑥400-(1300÷65+35) ⑦6.75+0.5-4.86 ⑧88×125.