①21/5÷7x5/9 ②5/14÷[6/7X(2/3+1/6)]
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解决时间 2021-04-04 14:39
- 提问者网友：我是女神我骄傲
- 2021-04-04 00:07
①21/5÷7x5/9 ②5/14÷[6/7X(2/3+1/6)]
最佳答案
- 五星知识达人网友：逐風
- 2021-04-04 00:24
①21/5÷7x5/9
=21/5×1/7×5/9
=1/3
②5/14÷[6/7X(2/3+1/6)]
=5/14÷(6/7×5/6)
=5/14÷5/7
=1/2
=21/5×1/7×5/9
=1/3
②5/14÷[6/7X(2/3+1/6)]
=5/14÷(6/7×5/6)
=5/14÷5/7
=1/2
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