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

Toán Lớp 7: B1 a) (-4/5+4/3)+(-5/4+14/5)-7/3 b)1/3×4/5+1/3×6/5-4/3 c) 4/9+-3/7+-3/7+15/19+5/7 d) -5/7+-5/7+9/14+1 5/7

Tháng Hai 15, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: B1
a) (-4/5+4/3)+(-5/4+14/5)-7/3
b)1/3×4/5+1/3×6/5-4/3
c) 4/9+-3/7+-3/7+15/19+5/7
d) -5/7+-5/7+9/14+1 5/7

Comments ( 2 )

  1. lanhuongthu
    lanhuongthu
    15 Tháng Hai, 2023 at 12:28 chiều
    Reply
    a)( -4/5 + 4/3) + ( -5/4  +14/5) – 7/3
    = -4/5 + 4/3 + (-5/4) + 14/5 – 7/3
    = (-4/5 + 14/5) + (4/3 – 7/3) + (-5/4)
    = 2 + (-1) + (-5/4)
    = 1 + (-5/4)
    = -1/4
    ———————————————————
    b) 1/3 . 4/5 + 1/3 . 6/5 – 4/3
    = 1/3 . ( 4/5 + 6/5) – 4/3
    = 1/3 . 2 – 4/3
    = 2/3 – 4/3
    = -2/3
    —————————————————–
    c) 4/19  . \frac{-3}{7} + \frac{-3}{7} . 15/19 + 5/7
    = \frac{-3}{7}  . ( 4/19 + 15/19) + 5/7
    = \frac{-3}{7}  . 1 + 5/7
    = -3/7 + 5/7
    = 2/7
    —————————————————————
    c)-5/7 + \frac{-5}{7}+ 9/14 + 1 5/7
    = -10/14 + -10/14 + 9/14 + 24/14
    = \frac{-10+ (-10) + 9 + 24}{14}
    = 13/14

  2. haianhtu97
    haianhtu97
    15 Tháng Hai, 2023 at 12:28 chiều
    Reply
    Đây bạn.
    $@ThanhTruc2008$

    toan-lop-7-b1-a-4-5-4-3-5-4-14-5-7-3-b-1-3-4-5-1-3-6-5-4-3-c-4-9-3-7-3-7-15-19-5-7-d-5-7-5-7-9-1

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

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