列竖式计算.33×21 13×32 43×12.
9×99+99.
用简便方法计算. (1)(2)÷19+× (3)(1.6+1.6+1.6+1.6)×25(4)9.25×9.9+92.5%
简便计算 (1)9999+9998+9997+9996(2)22222×999999 (3)454十999×999十545(4)20082008×2007﹣20072007×2008.
计算下面各题,怎样简便就怎样算.×0.25+0.375×4.97+6.38+5.03﹣4.38 5.84×1.36+13.6×0.316+1.36﹣÷×0.5.
下面各题怎样简便就怎样算. 3.7×99+3.7+﹣5.37﹣1.47﹣2.53 105×(+)13+45÷9×+×.