Mathematics
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    56.32 - 4.9×2.5
    3.45+0.087×0.7
    6.7×5.8×1.1
    44*0.85X+0.15*20X=18000*0.53
    44*0.85X+0.15*20X=13500*0.53
    1000000=500x-(6000000+250x)
    1000000=500Q-(6000000+250Q)
    1000000=500*x-(6000000+250*x
    2x - 4(10-x)=8
    4(20-x) - 2x =8
    10.2×7.3+898×0.73
    8.25×43+0.0825×2100+825×0.36
    15 × 4.8 + (19 - 15) × 6.9
    42 × 5.18 - 38 × 5.36
    2 × 160.50 + 189.90
    3.42×99.8
    2.5×32.4
    0.125×0.88
    12.5×0.064
    0.4 × 1.25 × 25 × 0.8

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