口算下面各题.4.8÷1.2= 5.5÷1.1= 0.4×0.05=1.6÷0.04= 0.25÷0.5= 0.8×1.25=9.6÷0.6= 0.92÷0.4= 7.8÷1.3=0.2×1.5=
脱式计算. 3.7×99+3.79.6﹣11÷7+×412×(+﹣)
9.744÷2.4﹣2.4×0.5.
×1.67+0.33× 999×667+667.
计算: (1)19175÷59+678 (2)36.5×1.4﹣8.51÷3.7 (3)4+4÷3×1 (4)4.6×+0.6×3.4+2× (5)[1+(2﹣0.35)×]÷12.
下列各题怎样简便就怎样计算 (1) (2) (3)2012×20.11﹣201.2×201 (4).