在直线上用点表示下面的分数.
2.47×6.5+7.53×6.5 0.65×1014.12﹣1.78﹣1.22 3.6+6.4×1.5.
下面各题怎样简便就怎样计算.9.9×25 0.75×0.5×4×0.21.25×32×0.25 8.12×4+1.88×40.32×13.4﹣0.32×3.4 3.84×99+3.842.009×390+20.09×41+200.9×2 (9.57+9.57+9.57+9.57 )×25.
怎样简便就怎样计算.9.8×25 0.78×101 1.50×102 0.25×0.7×0.80.56×99+0.56 1.2×2.5+0.8×2.5 0.038×5×2.1.
用竖式计算.2.5×2.8= 0.24×4.3= 6.05×0.54=
用竖式计算.4.9×3.5 2.59×0.84 3.206﹣2.987 13.97+59.73.