一张白纸,包书用去1/5,包本子把剩下的纸全部用完,包本子比包书多用去几分之几?2P1U*[1h3l7y4b
算式:提示)}2y0i7P+X2P1U*[1h3l7y4b
答:包本子比包书多用去4]9m(o,t*x2m-R/F9j。2P1U*[1h3l7y4b