72乘以2.09减1.8乘以73.6

9乘以72乘以125简便法 20042004乘以2005减20052005乘以2004 (-7)乘以(-11)减12乘以(-8) 4.2乘以1.2减5.2乘以0. 328乘以负0.25减147乘以负0,125加253乘以8分之1加72乘以负4分之1 2000乘以1999减1999乘以1998加1998乘以1997减1997乘以1996,简算 【2009乘以2008减2008乘以2008】乘以0.01乘以0.01 9.8乘以65.2乘以1.25减12.5乘以0.625乘以18怎样简算 2009加2009乘以2008乘以0.25加2008乘以2009乘以0.75减8乘以2009乘以0.125乘以2008 25乘以?乘以?等于（?乘以12）乘以（?乘以? 20乘以20减19乘以19加18乘以18减17乘以17加...加2乘以2减1乘以1的结果 加10%是乘以1 40%乘以1.4 50%乘以1.4 60%乘以1.4 70%乘以1.7 80%乘以1.8 90% 1.