三道小学简算

题目

三道小学简算
二十九分之十六X十二+二十九分之十七X十六94X0.8+9.4X2两千零七X两千零八分之两千零七

答案

1.16/29 x 12 + 17/29 x 16 = 16/29 x 12 + 16/29 x 17 = 16/29 x (12 +17) = 16/29 x 29 = 16
2.94x0.8 + 9.4x2 = 94x0.8+94 x0.2 = 94 x (0.8+0.2) = 94x1 = 94
3.2007x 2007/2008
= (2008-1)x 2007/2008
= 2008x 2007/2008 - 1 x 2007/2008
= 2007 - 2007/2008
= 2006又1/2008