用竖式计算.504×2= 213×5= 109×8= 650×4= 1300×9= 328×3=
下面各题怎样简便怎样算. 11.41﹣(3.41+3.53)﹣4.47= (﹣)×45= 0.125×32×2.5=.
能简算的要简算+++×(+)÷(3﹣﹣)÷[﹣(+)]
简便运算. 578﹣298 3.64÷4+4.36×25% 23.5+99×23.5.
21×42+21×63﹣21×5= .
(7.88+6.77+5.66)×(9.31+10.98+10)﹣(7.88+6.77+5.66+10)×(9.31+10.98)= .