1/2乘60%
    1×1×1.1×0.45×10^(-3)×200×1242√((2+0.6×0.303) √35×0.00201×330)
    100×760/(200×1255)
    0.6×1.28×1.242
    569.08/(356.89×1.242)
    76.50+(424.98－76.50)(2×7.845 )/19.5
    1.3×7387.497×(273+240)/273
    1.3×298.662×(1.29×273/(273+25))/(1.30×273/(273+240))
    25.5-7.20+195.77+25.016+59.576
    -15×(1.29×273/(273+25)-1.30×273/(273+240))+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273
    √((4×0.422)/3.14)
    9117.497/(6×3600)
    310×60＝ 150×60＝ 1020÷60= 440×30＝ 173×30＝ 2400÷80= 408×40＝ 182×40＝ 3600÷90=
    7387.497+1730
    1060×60＝ 300×60＝ 2100÷210=
    230×40＝ 132×40＝ 1400÷40= 65×20＝ 214×2＝ 3600÷120= 105×200＝ 294×20＝ 5600÷200=
    0.05×(0.46/0.250+0.8/0.231+6.75/0.593)×(1.5^2)/2×1.3×(273+240)/273+0.05×1.5/0.462×3^2/2×1.3×(273+240)/273+0.03×8/0.35×5^2/2×1.3×(273+240)/273
    43×400＝ 172×40＝ 2000÷80= 206×20＝ 140×60＝ 1000÷50= 32×500＝ 151×50＝ 1500÷60=
    2×0.575×0.612/(0.575+0.612)
    2×0.575×0.612/0.575+0.612

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