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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 4: 4/3 : 5/4 : 6/5 : 7/6 : 8/7 : 9/8 tính nhanh nha

Toán Lớp 4: 4/3 : 5/4 : 6/5 : 7/6 : 8/7 : 9/8
tính nhanh nha

Comments ( 2 )

  1. Giải đáp:
    4/3 : 5/4 : 6/5 : 7/6 : 8/7 : 9/8
    = 4/3 . 4/5 . 5/6 . 6/7 . 7/8 . 8/9
    =( 4/3 .  4/5 . 5/6). ( 6/7. 7/8 . 8/9)
    = 8/9 . 2/3
    =16/27

  2. 4/3 : 5/4 : 6/5 : 7/6 : 8/7 : 9/8
    = 4/3 . 4/5 . 5/6 . 6/7 . 7/8 . 8/9
    = (4/3 . 4/5 . 5/6) . (6/7 . 7/8 . 8/9)
    = 8/9 . 2/3
    = 16/27
     

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222-9+11+12:2*14+14 = ? ( )

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