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

Toán Lớp 5: (1+3/4)x(1+3/7)x(1+3/10)x(1+3/13)x(1+3/16)

Toán Lớp 5: (1+3/4)x(1+3/7)x(1+3/10)x(1+3/13)x(1+3/16)

Comments ( 2 )

  1. Giải đáp:
    19/4 
    Lời giải và giải thích chi tiết:
    ( 1 + 3/4 ) xx ( 1 + 3/7 ) xx ( 1 + 3/10 ) xx ( 1 + 3/13 ) xx ( 1 + 3/16 )
    = ( 4/4 + 3/4 ) xx ( 7/7 + 3/7 ) xx ( 10/10 + 3/10 ) xx ( 13/13 + 3/13 ) xx ( 16/16 + 3/16 )
    = 7/4 xx 10/7 xx 13/10 xx 16/13 xx 19/16
    = ( 7 xx 10 xx 13 xx 16 xx 19 )/( 4 xx 7 xx 10 xx 13 xx 16 )
    = 19/4

  2. (1+3/4)x(1+3/7)x(1+3/10)x(1+3/13)x(1+3/16)
    = 7/4x  10/7 x 13/10 x 16/13 x 19 /16
    = 7 x 10 x 13 x 16 x 19 / 4 x 7 x 10 x 13 x 16
    =19/4
     

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

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