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

Toán Lớp 5: 38,25 – 18,25 + 21,64 – 11,64 + 9,93 tính bằng cách thuận tiện

Toán Lớp 5: 38,25 – 18,25 + 21,64 – 11,64 + 9,93
tính bằng cách thuận tiện

Comments ( 2 )

  1. 38,25 – 18,25 + 21,64 – 11,64 + 9,93
    = (38,25 – 18,25) + (21,64 – 11,64) + 9,93
    = 20 + 10 + 9,93
    = 30 + 9,93
    = 39,93

  2. 38,25 – 18,25 + 21,64 – 11,64 + 9,93
    = ( 38,25 – 18,25 ) + ( 21,64 – 11,64 ) + 9,93
    = ( 20 + 10 ) + 9,93
    = 30 + 9,93
    = 39,93

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