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

Toán Lớp 6: 72+115+28+85 56 x 41 + 56 x 59 87 : 3 – 7 x 2 mũ 2

Toán Lớp 6: 72+115+28+85
56 x 41 + 56 x 59
87 : 3 – 7 x 2 mũ 2

Comments ( 2 )

  1. 72 + 115 + 28 + 85
    = (115 + 85) + (72 + 28)
    = 200 + 100
    = 300
    _____________________________
    56 xx 41 + 56 xx 59
    = 56 . (41 + 59)
    = 56 . 100
    = 5600
    ______________________________
    87 : 3 – 7 xx 2^{2}
    = 29 – 7 xx 4
    = 29 – 28
    = 1

  2. 72+115+28+85
    =72+28+115+85
    =100+200
    =300
    56xx41+56xx59
    =56xx(41+59)
    =56xx100
    =5600
    87:3-7xx2^2
    =29-7.4
    =29-28
    =1.

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