.一、口算。结果请用最简分数表示。121121+ 1=- =- =324554173- =- =7788125211+=- =+ =510563338- 14=5512 -12 =16+13=338+8=1- 78=1- 512=57- 57=16 + 712=910- 12=589 + 9 =1924 -1324 =.23+ 13=910 - 110 =425 ...
时间:2025-01-30 03:43栏目:行业资料