13分之4乘0.375加13分之3除以9分之8
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因为0.375=3/8,所以
4/13×0.375+3/13×8/9
=4/13×3/8+1/13×8/3
=1/13×3/2+1/13×8/3
=1/13×(3/2+8/3)
=1/13×(9/6+16/6)
=1/13×25/6
=25/78
4/13×0.375+3/13×8/9
=4/13×3/8+1/13×8/3
=1/13×3/2+1/13×8/3
=1/13×(3/2+8/3)
=1/13×(9/6+16/6)
=1/13×25/6
=25/78
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