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4/7×1/4+0.25×3/7-1/4
4/5x×(1/2+0.4)=4.32
4/7×0.5÷6/7
4/55×12.1×5/44
4.1+(+1/2)+(-1/4)+(-10.1)+7
8×5/4+1/4
4/5×4/7×5/4-1/2
4-1÷4-1/4x3
4/9×62.5%+4/9×3/8
4/5÷(-1)
4/5×2+1/2×2
-4/7×3.59-4/7×2.41+4/7×(-3)
4+(-1)
134735×(1+4.8%)
4/5×2+1/2×2怎么算
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