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

Toán Lớp 6: `a)(-2/3+3/7):4/5+(-1/3+4/7):4/5` `b)5/9:(1/11-5/22)+5/9:(1/15-2/3)`

Home/ Toán Lớp 6: `a)(-2/3+3/7):4/5+(-1/3+4/7):4/5` `b)5/9:(1/11-5/22)+5/9:(1/15-2/3)`

Toán Lớp 6: `a)(-2/3+3/7):4/5+(-1/3+4/7):4/5` `b)5/9:(1/11-5/22)+5/9:(1/15-2/3)`

Tháng Mười Hai 10, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a)(-2/3+3/7):4/5+(-1/3+4/7):4/5
b)5/9:(1/11-5/22)+5/9:(1/15-2/3)

Comments ( 2 )

  1. haiyemy
    haiyemy
    10 Tháng Mười Hai, 2022 at 2:36 sáng
    Reply
    a, (-2/3 + 3/7) : 4/5 + (-1/3 +4/7) : 4/5
    = -2/3 . 5/4 + 3/7 . 5/4 + -1/3 . 5/4 + 4/7 . 5/4
    = 5/4 . ( -2/3 + -1/3 + 3/7 + 4/7 )
    = 5/4 . ( -1 + 1)
    = 5/4 . 0
    = 0
    b, 5/9 : ( 1/11 – 5/22) + 5/9 : ( 1/15 – 2/3 )
    = 5/9 : -3/22 + 5/9 : -3/5
    = 5/9 . 22/-3 + 5/9 . 5/-3
    = 5/9 . ( -22/3 + -5/3)
    = 5/9 . -9
    = -45/9
    = -5

  2. ngoclanquynh
    ngoclanquynh
    10 Tháng Mười Hai, 2022 at 2:35 sáng
    Reply
    a) (-2/3 + 3/7) : 4/5 + (-1/3 + 4/7) : 4/5
    = -2/3 . 5/4 + 3/7 . 5/4 + -1/3 . 5/4 + 4/7 

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

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