如题所述
8分之7乘以7+8分之3
=49/8+3/8
=52/8
=13/2
(16分之5+27分之1)乘以8+27分之19
=5/16x8+1/27x8+19/27
=5/2+(8/27+19/27)
=5/2+1
=7/2
=49/8+3/8
=52/8
=13/2
(16分之5+27分之1)乘以8+27分之19
=5/16x8+1/27x8+19/27
=5/2+(8/27+19/27)
=5/2+1
=7/2
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