正方体棱长总和是36分米,每条棱长是( ),表面积是( ).
3.45×6.8+65.5×0.68= .
计算:1.999×370﹣19.99×6+1999×0.69= .
(1)45.7﹣29.25﹣0.75= . (2)2.25×2.25×32= .
计算:2013.05×601+1550×201.305+201305×2.44= .
4.76×3.8+1.5×5.24﹣2.3×4.76= .