(1/2+1/3)÷3/5-17/18求简便运算.

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(1/2+1/3)÷3/5-17/18求简便运算.(1/2+1/3)÷3/5-17/18求简便运算.(1/2+1/3)÷3/5-17/18求简便运算.=5/6x5/3-17/18=25/18-17/1

(1/2+1/3)÷3/5-17/18求简便运算.
(1/2+1/3)÷3/5-17/18求简便运算.

(1/2+1/3)÷3/5-17/18求简便运算.
=5/6x5/3-17/18
=25/18-17/18
=4/9