23×41+16×41-9×41=1230如有帮助请采纳，如对本题有疑问可追问，Good luck!
23×41+16×41-9×41=41×（23+16-9）=41×30=1230
(23 + 16 - 9) X 41= 30 X 41= 1230
41*(23+16-9)=1230
23ⅹ41+16x41-9ⅹ41=41x(23+16-9)=41x30=1230
