24×1.25×0.25=6×1.25x4×0.25=7.5x1=7.5希望帮到你 望采纳 谢谢 加油
24x0.25x1.25=6x1.25x4x0.25=7.5x1=7.5
(20✘1.25+4✘1.25)✘0.25