7/11÷[2/5-(1-7/10)]等于几

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7/11÷[2/5-(1-7/10)]等于几
7/11÷[2/5-(1-7/10)]等于几

7/11÷[2/5-(1-7/10)]等于几
7/11÷[2/5-(1-7/10)]
=7/11÷[2/5-3/10]
=7/11÷(1/10)
=7/11×10
=70/11
=6又11分之4

70/11

34

70\11 不难啊