10/9-(1/3÷3+10/13) (7/12-5/16)÷1/12-2/3 1
10/9-(1/3÷3+10/13)(7/12-5/16)÷1/12-2/31/5×2/9+7/9÷5简便计算...
10/9-(1/3÷3+10/13) (7/12-5/16)÷1/12-2/3 1/5×2/9+7/9÷5 简便计算
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2015-11-29
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10/9-(1/3÷3+10/13)
=10/9-1/9-10/13
=1-10/13
=3/13
(7/12-5/16)÷1/12-2/3
=(7/12-5/16)x12-2/3
=7-15/4-2/3
=7-45/12-8/12
=7-53/12
=7-4-5/12
=2又7/12
1/5×2/9+7/9÷5
=2/45+7/45
=9/45
=1/5
=10/9-1/9-10/13
=1-10/13
=3/13
(7/12-5/16)÷1/12-2/3
=(7/12-5/16)x12-2/3
=7-15/4-2/3
=7-45/12-8/12
=7-53/12
=7-4-5/12
=2又7/12
1/5×2/9+7/9÷5
=2/45+7/45
=9/45
=1/5
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