4/9×2/7+2/7=? 1/6-3/8×1/6=? 1/9-6/7×1/9=? 要简便运算,要过程!急
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4/9×2/7+2/7
=2/7x(4/9+1)
=2/7x13/9
=26/63
1/6-3/8×1/6
=1/6x(1-3/8)
=1/6x5/8
=5/48
1/9-6/7×1/9
=1/9x(1-6/7)
=1/9x1/7
=1/63
=2/7x(4/9+1)
=2/7x13/9
=26/63
1/6-3/8×1/6
=1/6x(1-3/8)
=1/6x5/8
=5/48
1/9-6/7×1/9
=1/9x(1-6/7)
=1/9x1/7
=1/63
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展开全部
4/9×2/7+2/7
=2/7x(4/9+1)
=2/7x13/9
=26/63
1/6-3/8×1/6
=1/6x(1-3/8)
=1/6x5/8
=5/48
1/9-6/7×1/9
=1/9x(1-6/7)
=1/9x1/7
=1/63
=2/7x(4/9+1)
=2/7x13/9
=26/63
1/6-3/8×1/6
=1/6x(1-3/8)
=1/6x5/8
=5/48
1/9-6/7×1/9
=1/9x(1-6/7)
=1/9x1/7
=1/63
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展开全部
4/9×2/7+2/7
=2/7x(1+4/9)
=26/63
1/6-3/8×1/6
=1/6(1-3/8)
=5/48
1/9-6/7×1/9
=1/9(1-6/7)
=1/63
=2/7x(1+4/9)
=26/63
1/6-3/8×1/6
=1/6(1-3/8)
=5/48
1/9-6/7×1/9
=1/9(1-6/7)
=1/63
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你对这个回答的评价是?
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