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

16/29*12+17/29*16
=4/29*(48+68)
=4/29*116
=4*4
=16
94*0.8+9.4*2
=9.4*(8+2)
=94
2007*2007/2008
=2007*(1-1/2008)
=2007-2007/2008
=2006又1/2008

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