列竖式计算.(1)386+279=验算 (2)631﹣329=验算 (3)425×6= (4)43÷6=
计算:1.2×67+6.7×88= .
下面各题,怎样简便就怎样算. 450﹣225÷5+135 25×71×4 99×425 101×79﹣79 304+306÷17﹣298.
简算与计算 3600000÷125÷32÷251.25×6.78+25×3.47+125×0.0382.
(1)7.2×1.43÷÷1.1 (2)0.125×76.8+12.5×0.132+1.25 (3)9 (4).
0.23×56+2.3×440+0.46×0.5.