##60color(white)(i)minutes##
If Daniel practiced his new dance moves on Monday and Tuesday for ##30## minutes on each day then he danced for two days. Since you know he danced for ##30## minutes for each day multiply ##30## minutes per day by ##2## days to determine the total number of minutes he danced for.
Thus:
##2color(white)(i)daysxx(30color(white)(i)minutes)/day##
##=2color(white)(i)color(red)cancelcolor(black)(days)xx(30color(white)(i)minutes)/color(red)cancelcolor(black)(day)##
##=2xx30color(white)(i)minutes##
##=color(green)(|bar(ul(color(white)(a/a)60color(white)(i)minutescolor(white)(a/a)|)))##
##:.## he would have practiced for ##60color(white)(i)minutes##.