(3/4-3/16)×(2/9+1/3)等于

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(3/4-3/16)×(2/9+1/3)等于(3/4-3/16)×(2/9+1/3)等于(3/4-3/16)×(2/9+1/3)等于(3/4-3/16)*(2/9+1/3)=(12/16-3/16)*

(3/4-3/16)×(2/9+1/3)等于
(3/4-3/16)×(2/9+1/3)等于

(3/4-3/16)×(2/9+1/3)等于
(3/4-3/16)*(2/9+1/3)
=(12/16-3/16)*(2/9+3/9)
=9/16 x 5/9
=5/16