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

Toán Lớp 7: 3/7 + -5/2 + -3/5 -1/24 – [1/4 – (1/2 – 7/8 )] (5/7 – 7/5) [ 1/2 – ( -2/7 – 1/10)

Tháng Chín 30, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: 3/7 + -5/2 + -3/5
-1/24 – [1/4 – (1/2 – 7/8 )]
(5/7 – 7/5) [ 1/2 – ( -2/7 – 1/10)

Comments ( 2 )

  1. minhtuyethue
    minhtuyethue
    30 Tháng Chín, 2022 at 8:39 chiều
    Reply
    1) 3/7 + (-5/2) + (-3/5)
    = 3/7 – 5/2 – 3/5
    = -29/14 – 3/5
    = -187/70
    2) -1/24 – [ 1/4 – ( 1/2 – 7/8 )]
    = -1/24 – ( 1/4 + 3/8 )
    = -1/24 – 5/8
    = -2/3
    3) ( 5/7 – 7/5 ) [ 1/2 – ( -2/7 – 1/10 )
    = -24/35 ( 1/2 + 27/70 )
    = -24/35 . 31/35
    = -744/1225
     

  2. hauthanhyen98
    hauthanhyen98
    30 Tháng Chín, 2022 at 8:38 chiều
    Reply
    a) 3/7 + (-5/2) + -3/5
    =(-29)/14+(-3)/5
    =(-187)/70
    b)-1/24-[1/4-(1/2-7/8)]
    =-1/24-[1/4-(-3)/8)]
    =-1/24-5/8
    =-2/3
    c)(5/7-7/5) [1/2-(-2/7-1/10)]
    =-24/35 [1/2-(-27)/70]
    =-24/35 * 31/35
    =(-744)/1225

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

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