13 1/5×5/6+28 2/7×7/9

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13 1/5×5/6+28 2/7×7/9
13 1/5×5/6+28 2/7×7/9

 


13 1/5×5/6+28 2/7×7/9
=(13×5+1)÷6+(28×7+2)÷9
=66÷6+198÷9
=11+22
=33