一根铁丝长30米用去它的1⼀3米还剩多少米?

一根铁丝长30米用去它的1/3米还剩多少米?
2025-04-01 00:32:03
推荐回答(1个)
回答1:

30-30×1/3
=30-10
=20米

30×(1-1/3)
=30×2/3
=20米