计算.35×2= 135÷3= 72×5= 630÷9=85÷5= 189÷9= 76×2= 45×8=
怎样简便就怎样算①0.25×1.25×0.8×0.4②③1990×198.9﹣1989×198.8④2007⑤(1)+(1))+…(1)
怎样简便就怎样算① ②③397÷7+47.5÷0.7+105.6÷1.4 ④﹣+﹣+…﹣.
937×125×25×64×5= .
用简便方法计算.78500÷14= 900×14=
计算下面各题,怎样简便就怎样计算.234×12+166×12 (40+4)×251008÷(71﹣62)÷8 357+123﹣257+277.