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

Toán Lớp 4: e) 245 x 327 – 245 x 26 – 245 g) 125 x 6 x 8 x 4 h) 2005 x 1999 – 1000 x 2005 + 2005 i) 624 : 3 – 3

Toán Lớp 4: e) 245 x 327 – 245 x 26 – 245
g) 125 x 6 x 8 x 4
h) 2005 x 1999 – 1000 x 2005 + 2005
i) 624 : 3 – 324 : 3
k) 32000 : 125 : 8

Comments ( 2 )

  1. e) 245 x 327 – 245 x 26 – 245
    = 245 x 327 – 245 x 26 – 245 x 1
    = 245 x ( 327 – 26 – 1 )
    = 245 x 300
    = 73 500
    g) 125 x 6 x 8 x 4
    = (125 x 8 ) x ( 6 x 4 )
    = 1000 x 24
    = 24 000
    h) 2005 x 1999 – 1000 x 2005 + 2005
    =2005 x 1999 – 1000 x 2005 + 2005 x 1
    = 2005 x ( 1999-1000+1)
    = 2005 x 1000
    = 2 005 000
    i) 624 : 3 – 324 : 3
    = ( 624 – 324 ):3
    = 300 : 3
    = 100
    k) 32000 : 125 : 8
    = 32 000 : ( 125 x 8)
    = 32 000 : 1 000
    = 32

  2. Giải đáp+Lời giải và giải thích chi tiết:
    e) 245 x 327 – 245 x 26 – 245
    = 245 x 327 – 245 x 26 – 245 x 1
    = 245 x ( 327 – 26 – 1 )
    = 245 x 300
    = 73 500
    g) 125 x 6 x 8 x 4
    = (125 x 8 ) x ( 6 x 4 )
    = 1000 x 24
    = 24 000
    h) 2005 x 1999 – 1000 x 2005 + 2005
    =2005 x 1999 – 1000 x 2005 + 2005 x 1
    = 2005 x ( 1999-1000+1)
    = 2005 x 1000
    = 2 005 000
    i) 624 : 3 – 324 : 3
    = ( 624 – 324 ):3
    = 300 : 3
    = 100
    k) 32000 : 125 : 8
    = 32 000 : ( 125 x 8)
    = 32 000 : 1 000
    = 32

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