Once there was no zero.To writenumerals(数字)for sixty-three,peoplewrote 63. To write six hundred three.people wrote 6 3.The space theremeans“not any”tens.Sometimes peo-ple did not remember the space. Itwas hard to ...Once there was no zero.To writenumerals(数字)for sixty-three,peoplewrote 63. To write six hundred three.people wrote 6 3.The space theremeans“not any”tens.Sometimes peo-ple did not remember the space. Itwas hard to see and to read.展开更多
文摘Once there was no zero.To writenumerals(数字)for sixty-three,peoplewrote 63. To write six hundred three.people wrote 6 3.The space theremeans“not any”tens.Sometimes peo-ple did not remember the space. Itwas hard to see and to read.
