□里应填几。
下面各题怎样算简便就怎样算1.7+5.02+3.98 6÷﹣÷6 ×﹣÷133.5×98+35×0.2 3.35×99×2+6.7 ×[÷(﹣)].
下面各题怎样算简便就怎样算 3.6×98+36×0.2 9.57﹣(2.57+3.38)﹣2.62.
(1)14﹣6.46﹣3.54= (2)4.2÷1.5﹣1.5×0.6= (3)(4﹣3)÷(+)=(4)51.6÷[(3﹣1.25)×]= (5)(0.92+)÷(4﹣2)= (6)(5﹣1.8)÷[(1.15+)×1]=
计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.①3000﹣45×36②3.9+3.9×99③20.5÷(8.5﹣0.3)④⑤⑥1005÷[42×()].
9.81×0.1+0.5×98.1+0.049×981.