圆柱的底面半径3厘米,高8厘米,求表面积?
计算下面各题(能简算的要简算)(1)×101﹣ (2)2.5×2.72+0.24×2.5+1.04×2.5 (3)200﹣120÷1.6×1.2.
用简便方法计算 .
简算2.25×+1.75×+0.6 2.5×(1.9+1.9+1.9+1.9)
简算4.5×25%+1.3×+2.2×0.25 5.02﹣1.37﹣2.63 ×40﹣÷.
简算:3.61÷+6.39× 0.25×32×0.15 8×+8×+8 3﹣2+5﹣1.