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(3/68+1/18)×6×17
=3/68×102+1/18×102
=9/2+17/3
=61/6
0.75×5/9+3/4×3/9+3/4×1/9
=3/4×(5/9+3/9+1/9)
=3/4
(5/12+3/4)×1又1/3
=5/12×4/3+3/4×4/3
=5/9+1
=14/9
=3/68×102+1/18×102
=9/2+17/3
=61/6
0.75×5/9+3/4×3/9+3/4×1/9
=3/4×(5/9+3/9+1/9)
=3/4
(5/12+3/4)×1又1/3
=5/12×4/3+3/4×4/3
=5/9+1
=14/9
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展开全部
0.75×5/9+3/4×3/9+3/4×1/9
=3/4×(5/9+3/9+1/9)
=3/4×1
=3/4
=3/4×(5/9+3/9+1/9)
=3/4×1
=3/4
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