數學的排列美 2019-02-172017-02-19 111,111,111 x 111,111,111 = 12,345,678,987,654,321 3 x 37 = 111 6 x 37 = 222 9 x 37 … 更多…
網上學與教支援 2019-02-172016-11-16 http://wlts.edb.hkedcity.net/tc/mathematics/index.html http://hkedcity.net/edb/teachingresources/files/pmaths/100numbergrid.swf