| 3 |
| 5 |
答：这堆煤原来有20吨．
一堆煤用去3/5，还剩下12吨，这堆煤原来有多少吨？
一堆煤用去
，还剩下12吨，这堆煤原来有多少吨？
| 3 |
| 5 |
数学人气：849 ℃时间：2020-02-03 09:31:21
优质解答
12÷
=20（吨）．
答：这堆煤原来有20吨．
答：这堆煤原来有20吨．
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