(2/3-5/6-5/7-5/8)(X-24) 初一有理数简便计算
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(2/3-5/6-5/7-5/8)(X-24) 初一有理数简便计算
(2/3-5/6-5/7-5/8)X(-24)
= 2/3X(-24)-5/6X(-24)-5/7X(-24)-5/8X(-24)
= -16+20+5/7X24+15
= 19+ 120/7
= 19+17又1/7
= 36又1/7
再问: (-3)X(-5)X(-1/3)X(-3/7)X(-4/5)x(-7/24) 简便计算 要过程!!!
再答: (-3)X(-5)X(-1/3)X(-3/7)X(-4/5)x(-7/24) = 3x5x1/3x3/7x4/5x7/24 = 3x1/3x3/7x7/24x5x4/5 = (3x1/3)x(3/7x7/24)x(5x4/5) = 1x 1/8x4 =1/2
= 2/3X(-24)-5/6X(-24)-5/7X(-24)-5/8X(-24)
= -16+20+5/7X24+15
= 19+ 120/7
= 19+17又1/7
= 36又1/7
再问: (-3)X(-5)X(-1/3)X(-3/7)X(-4/5)x(-7/24) 简便计算 要过程!!!
再答: (-3)X(-5)X(-1/3)X(-3/7)X(-4/5)x(-7/24) = 3x5x1/3x3/7x4/5x7/24 = 3x1/3x3/7x7/24x5x4/5 = (3x1/3)x(3/7x7/24)x(5x4/5) = 1x 1/8x4 =1/2
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