问题 解答题 6000000=______万10200000000=______亿3900000=______万1300000000=______亿7000000=______万8000000000=______亿. 答案 6000000=600万10200000000=102亿3900000=390万1300000000=13亿7000000=700万8000000000=80亿.故答案为:600,102,390,13,700,80.