7/15-1/3+1/5等于多少用递等式计算？

Question

如题所述

Answer 1

7/15-1/3+1/5
=7/15+1/5-1/3
=7/15+3/15-1/3
=10/15-1/3
=2/3-1/3
=1/3本回答被网友采纳

Answer 2

解：7/15-1/3+1/5
＝7/15-5/15+3/15
＝2/15+3/15
＝5/15
＝1/3

Answer 3

7/15-1/3+1/5
=2/15+1/5
=1/3