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分數的加减都首先要把分母化成相同的數位才可以比如1/3+1/2=2/6+3/6=5/6 1/2+1/4=1/4+2/4=3/4乘法的話直接分子乘分子分母乘分母就可以了比如1/2*1/6=1/12 3/4*8/9=24/36=2/3除法的話,把除號後面的數位…
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