556÷4= 945÷3=5×18÷9= 360÷9=357+7= 936÷3÷3=
(1):x=2:1.8 (2)[(1.4+1.6×2)×(1÷﹣2.375)]+2.901(3)2007×20082008﹣2008×20072007 (4)++++…+.
下面各题,怎样算简便就怎样算.1080+270÷18﹣864 7.54++2.46+ (2.4﹣)÷0.625+2.5×12.5×40×0.8 6﹣÷﹣ .
下面各题,怎样简便就怎样算.19.98×37﹣199.8×1.9+1998×0.82 9999×7+1111×37[﹣(﹣)]× (70+)×.
脱式计算.0.6+32×0.25﹣6 ÷[(+)×] 1.05×(3.8﹣0.8)÷6.3 +×99+.
下面各题,怎样简便怎样算.(1)199+99×99 (2)75÷4+24×+(3)35.4﹣2.76+64.6+7.24 (4)(+0.2)÷0.25×250%