小学五年级奥数小数乘法简算

《小学五年级奥数小数乘法简算》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、小数乘法1.3X12.5x8X42.5X2.1X0.4X212.5X0.64X2.50.5x0.8X0.4X1.25X250.125X0.125・・・x0.125x8x8x・・・X80.25X0.25X….x0.25X0.25X4X4X….x4乂0.5x0.8X0.4X1.25X25下面有两个数，a等于0.000.…0025,b等于0.000..…08,试a+b,b一a,axb。1.6X2.64+1.6X6.36+1.60.87X65.5+37.5乂0.87-3乂0.873.9X7.6+39X24+3.96.2X1.11+

2、2X6.2+6.2乂6.894.2X6.7+6.7X1.2+3.3乂5.4X0.253.1X0.75+0.75X6.2+9.38.63X2.3+7.7X5.21+3.42X7.75.72X1.8+0,7X5.72-2.5乂1.729.96x1.43.6X9.99100.7X2.81.98X30.23.75X48+62.5X4.83.6X5.4+7.2X2.32.01X67-1x0.673.75X48+62.5X4.875x4.67+17.9乂2.50.1+0.3+0.5+....+19.7+19.96.03+6.06+6.

3、09+....+7.950.1+0.3+0.5+0.7+0.9+0.11+0.13+....+0.97+0.99五0.9+9.9+99.9+999.9+9999.9+99999.9,的整数部分0.9+0.99+0.999+0.9999+0.99999的整数部分设a等于0.1+0.1+0.11,0.11..…11的整数部分求,1.3456十1.4563十1.5634十1.6345的整数部分1.07+1.007+1.0007+….+1.000….007的整数部分设a等于0.2+0.22+0.222+...+0.222……2求a

4、的整数部分。求0.81x0.6+0.82X0.6+….+0.97X0.6+0.99的06攵部分a等于8.28+8.98+8.998+8.9998+8.99998,a的整数部分是多少？