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

Toán Lớp 6: 35.(110-15)+15.(35-110) 82.25+(-82).25 tính nhanh

Toán Lớp 6: 35.(110-15)+15.(35-110)
82.25+(-82).25 tính nhanh

Comments ( 2 )

  1. Answer
    35 . (110 – 15) + 15 . (35 – 110)
    = 35 . 100 – 35 . 15 + 15 . 35 – 15 . 100
    = [(35 . 15) – (35 . 15)] + [(35 . 100) – (15 . 100)]
    = 0 + [(35 . 100) – (15 . 100)]
    = (35 . 100) – (15 . 100)
    = 100 . (35 – 15)
    = 100 . 20
    = 2000
    _____________________
    82 . 25 + (-82) . 25
    = 25 . (82 – 82)
    = 25 . 0
    = 0

  2. Giải đáp+giải thích các bước giải:
    35.(110-15)+15.(35-110)
    = 35.110-15+15.35-110
    =(35-35).(-15+15).(110-110)
    =0.0.0
    =0 
    82.25+(-82).25
    =82.25-82.25
    =(82-82).25
    =0.25
    =0
     

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