9⼀17×13⼀277+4⼀17×9⼀277简便计算

9/17×13/277+4/17×9/277简便计算
2025-06-27 00:33:09
推荐回答(2个)
回答1:

回答2:

9/17×13/277+4/17×9/277

=9x(13+4)/17x277

=9x17/17x277
=9/277