(0.75减16分之3)乘(9分之2加3分之1)=（12/16-3/16）*（2/9+3/9）=9/16*5/9=5/16
0.75=12/16 (0.75减16分之3)=9/16 3分之1=3/9 (9分之2加3分之1) =5/9
(0.75减16分之3)乘(9分之2加3分之1)=9/16x5/9=5/16
=(3/4+3/16)×(2/9+1/3)
=15/16×5/9
=48分之25
16分之5
[(3/4)-(3/16)]X[(2/9)+(1/3)]
=[(12/16)-(3/16)]X[(2/9)+(3/9)]
=(9/16)x(5/9)
=5/16
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