脱式计算(能简便的要简便).0.233﹣(0.133﹣)+ 4.62+9.9+5.38+0.1 4×0.6+0.6÷0.38×7﹣+4× 36×(﹣)+15 (+)×23×19.
,则□= .
= .
竖式计算. 402×22= 27×142= 286×35= 20×308= 200×45= 460×70=