← 退出1990 AMC8 · 逐题练习
第 1 / 25 题
1990 AMC8 · #1逻辑推理（跨域）★★☆☆☆
What is the smallest sum of two 3 -digit numbers that can be obtained by placing each of the six digits 4,5,6,7,8,9 in one of the six boxes in this addition problem?
将六个数字 4,5,6,7,8,9 放入此加法算式的六个方框中各一次，能得到的两个三位数之和最小是多少？
题号 · Questions对错未答