一本书小明第一天看了全书的,第二天看了全书的,还剩全书的几分之几没有看?
怎样简便怎样算. 8.2×99+8.24.8×0.250.78×9.9 8.96×0.32﹣0.96×0.322.6×1.9÷2.6×1.9.
65×8.7+6.5×0.23﹣0.65.
1997×19961996﹣1996×19971997.
99×101335+270+130+265625﹣180﹣225 35×99+35175×55+25×5550×25×20×40.
简便运算.×+×1.25×2.5×8 136﹣64﹣461.36+5.4+8.64+1.6.