十五分之四除以21等于多少?要过程!

2024-12-26 00:21:37
推荐回答(2个)
回答1:

4/15÷21
=4/15×1/21
=4/315

回答2:

4/15÷21
=4/15×1/12
=1/15×1/3
=1/45