用简便方法计算.
(1)4×0.8×2.5×12.5
(2)(6.4×12.5×0.5)÷(1.6×2.5×0.2)
(3)7.46×36+74.6×6.4.
简便计算
125×64﹣24×64﹣64 19+21+23+…+49+51
(25+19)×4 99999×26+33333×22
25×125×32 102×88
9000÷25÷4 99×46.
试题篮
()