(1X3X5X7X9X11X13X15X17X19)除以(57X85X105X117)等于多少(简便算法?
(1X3X5X7X9X11X13X15X17X19)除以(57X85X105X117)等于多少(简便算法)
1*3+3*5+5*7+7*9+9*11+11*13+13*15+15*17+17*19+19*21 = 1530 *3%2B3*5%2B5*7%2B7*9%2B9*11%2B11*13%2B13*15%2B15*17%2B17*19%2B19*21%3D
问:小学数学1X3+3X5+5X7+7X9+9X11+11X13+13X15+15X17+17X19+19X21=?
答:1*3+3*5+5*7+7*9+9*11+11*13+13*15+15*17+17*19+19*21 = 1530 *3%2B3*5%2B5*7%2B7*9%2...详情>>
答:详情>>