1. 下面各题怎样简便就怎样算

①86+49+351

②132-68-32

③143+64+57+136

④12×24-12×14

⑤72×125

⑥4600÷25÷4

⑦76×237+237×24

⑧99×38+38

⑨104×25

⑩43×98