直接写得数.80÷4= 120÷6= 480÷8= 180÷3=300÷5= 400÷8= 810÷9= 560÷7=720÷8= 630÷9= 8×40= 700×4=60×5= 8×40+5= 8+40×2= 4+20÷2=
用简便方法计算下面各题. (0.86+0.86+0.86+0.86)×254÷1+6× 125÷(50÷8) 7.6×÷[1.9﹣1.9×(1.9﹣1.9)].
下列各题,怎样算简便就怎样算. (1)4.85×0.17+0.485×8.3(2)+×99+ (3)2008×(4)2﹣2.86×(6.25﹣6)
下面各题,怎样简便就怎样算. 19.98×37﹣199.8×1.9+1998×0.829999×7+1111×37 231÷231(70+)×.
计算下面各题,怎么简便就怎样算 ①9﹣(3+0.4)②1.8×+2.2×25% ③(8﹣10.5×)÷4④2÷[5﹣4.5×(20%+)].
计算下面各题,怎样简便就怎样算. 33.02﹣(148.4﹣90.85)÷2.5 4×0.6+0.6÷ (1÷+÷1)÷5.118.1+(3﹣0.299÷0.23)×1.