(13+13×2+13)×25.
怎样简便怎样算. 63×10.14×0.125×8×0.2593÷0.31÷3 16÷0.9×1.83.5×5.2+0.35×4880.8×10.1÷808.
在○里填运算符号,在□中填数. (1)465﹣199 =465﹣200○□ =□○□ =□ (2)99×33 =(100○□)×33 =100×33○□×33 =□ (3)125×56 =125×(□×□) =125×□×□ =□ (4)3000÷4÷25 =3000÷(□○□) =3000÷□ =□
用简便方法计算. 6.32+7.89+3.6825.23﹣7.8﹣2.2125×(33×8) 49×19+81×497200÷4÷25 78×51﹣78.
下面各题,怎样简便就怎样算. ①0.276×2.5+2.5×2.724②1.25×32×0.25③17.47﹣7.57﹣2.43④3.21+9.46+6.79.
253×46+55×253﹣253.