问what is the hundreds digits of the interger z

条件2： z rounded to the nearest hundred is 9300

是说z约等于9300 吗

好像可以理解为四舍五入(韦伯字典好像是这样解释的)到第几位，‘what is the hundreds digits of the interger z, 条件2. z rounded to the nearest hundred is 9300’就是把十位数及以后的全部不要了，只保留到百位数。

Round:

Merriam-Webster's Dictionary的解释：to express as a round number often used with off *11.3572 rounded off to two decimal places becomes 11.36*

Longman Dictionary的解释：3、to change an exact figure to the nearest whole number round something ↔ off to 例句：Prices are rounded off to the nearest dollar.

round somebody/something ↔ up phrasal verb 3、to increase an exact figure to the next highest whole number see also round down