直接写出下面各题的得数.4.8÷0.8= 7.5×0.4= 5.7÷57= 0.75÷15=1÷0.25= 1.2×60= 6÷0.2= 0.21×4=0.62÷0.62﹣1= 5+3.2÷0.8= 7.5÷2.5×0= 0.25×4×9=
4.5×1.5+4.5×8.5.
用简便方法计算下面各题. 1.8×5.46+1.8×4.540.65×2012.33×0.5×4 99×5.64.8×0.252.64+8.67+1.33﹣1.64.
用简便方法计算. ①1.25×0.25×32②0.25×3.78×4③6.74×10.1④0.85×99 ⑤6.8×3.7+6.8×6.3.
7.22×7.8+7.8×2.78.
用你喜欢的方法计算: 125×5×8×225×14×472×17+17×2867×101.