一道数学题,比较大小的.two successive discounts of 20 percent and 40 percent are equivalent to a single discount of x percent.比较 x 和 52.相等)

来源:学生作业帮助网 编辑:作业帮 时间:2024/08/01 18:00:26
一道数学题,比较大小的.two successive discounts of 20 percent and 40 percent are equivalent to a single discount of x percent.比较 x 和 52.相等)
xPN@|)>GTӄۢGD%4 "1A~I&}-= n(<O;V|rEnZ#כSJPLY, iuPQ Pm)5ҁ4 ^*Fwar>^~,j2]#n*hƛmr?Qfϻm_RwzP'(

一道数学题,比较大小的.two successive discounts of 20 percent and 40 percent are equivalent to a single discount of x percent.比较 x 和 52.相等)
一道数学题,比较大小的.
two successive discounts of 20 percent and 40 percent are equivalent to a single discount of x percent.比较 x 和 52.
相等)

一道数学题,比较大小的.two successive discounts of 20 percent and 40 percent are equivalent to a single discount of x percent.比较 x 和 52.相等)
可以理解成如果一个东西先降价20%再降价40%后的价钱,与一次性降价X%的价钱相等,那X是多少.
(1-20%)*(1-40%)=1-X%
所以X=52