简便计算13.8﹣2.99 3.1+25.78+6.9 12.7﹣4.8﹣5.234.82﹣(4.82+15.2) 15.25+4.72+4.75+5.28 3.28﹣(2.2﹣1.28)
295÷0.25÷4.
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.