(1)1/2-1/6-1/20-1/32-/1/42怎么简便计算?(2)a与b互为相反数,x与y互为倒数,c的绝对值等于2,求a+b/2+xy-1/4c的值.(3)(1/3-1/6+1/12)x(-24)简便计算(4)4x(0.17)x(-25)简便计算(5)5x(负一又二分之一
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![(1)1/2-1/6-1/20-1/32-/1/42怎么简便计算?(2)a与b互为相反数,x与y互为倒数,c的绝对值等于2,求a+b/2+xy-1/4c的值.(3)(1/3-1/6+1/12)x(-24)简便计算(4)4x(0.17)x(-25)简便计算(5)5x(负一又二分之一](/uploads/image/z/11620802-2-2.jpg?t=%EF%BC%881%EF%BC%891%2F2-1%2F6-1%2F20-1%2F32-%2F1%2F42%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%3F%EF%BC%882%EF%BC%89a%E4%B8%8Eb%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2Cx%E4%B8%8Ey%E4%BA%92%E4%B8%BA%E5%80%92%E6%95%B0%2Cc%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%AD%89%E4%BA%8E2%2C%E6%B1%82a%2Bb%2F2%2Bxy-1%2F4c%E7%9A%84%E5%80%BC.%EF%BC%883%29%281%2F3-1%2F6%2B1%2F12%29x%28-24%29%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%884%EF%BC%894x%EF%BC%880.17%EF%BC%89x%EF%BC%88-25%EF%BC%89%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%885%EF%BC%895x%EF%BC%88%E8%B4%9F%E4%B8%80%E5%8F%88%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80)
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