8分之5乘以12分之5加12分之5乘以8分之5加8 - 知识问答

8分之5乘以12分之5加12分之5乘以8分之5加8分之5

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5/8×5/12+5/12×5/8+5/8
=5/8×(5/12+5/12+1)
=5/8×22/12
=55/48
1/3×3÷1/3×3
=1÷1/3×3
=3×3
=9

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