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

Toán Lớp 6: Tính a, 6 5/12 : 2 3/4 + 11 1/4 . ( 1/3 – 1/5 ) b, 5/16 : 0,25 – ( 2 1/4 – 0,6 ) . 10/11 c, 1,4 . 15/19 – ( 4/5 + 2/3 ) : 2 1/5 b, (-

Toán Lớp 6: Tính
a, 6 5/12 : 2 3/4 + 11 1/4 . ( 1/3 – 1/5 )
b, 5/16 : 0,25 – ( 2 1/4 – 0,6 ) . 10/11
c, 1,4 . 15/19 – ( 4/5 + 2/3 ) : 2 1/5
b, (-1,2) . (-3/24) + (0,4 – 1 4/15) : 1 2/3
e, 1 13/15 . 0,75 – (11/20 + 25%)
Lưu ý : VD : 6 5/12 nghĩa là sáu 5 phần 12 là hỗn số ,phần nguyên là 6 ,phần phân số là 5/12
Làm nhanh nha mn trước 2h chiều nay ạ :))

Comments ( 2 )

  1. a, 6 5/12 : 2 3/4 + 11 1/4 . (1/3 – 1/5)
    = 77/12 : 11/4 + 45/4 . 2/15
    = 7/3 + 3/2
    = 23/6
    b, 5/16 : 0,25 – (2 1/4 – 0,6) . 10/11
    = 5/16 : 1/4 – (9/4 – 3/5) . 10/11
    = 5/4 – 33/20 . 10/11
    = 5/4 – 3/2
    = $\frac{-1}{4}$ 
    c, 1,4 . 15/19 – (4/5 + 2/3) : 2 1/5
    = 21/190 – 22/15 : 11/5
    = 6/19 – 2/3
    = $\frac{-20}{57}$ 
    b, (-1,2) . (-3/24) + (0,4 – 1 4/15) : 1 2/3
    = (-6/5) . (-3/24) + (2/5 – 19/15) : 5/3
    = (-3/20) + (-13/25)
    = -37/100
    e, 1 13/15 . 0,75 – (11/20 + 25%)
    = 28/15 . 3/4 – (11/20 + 1/4)
    = 7/5 – 16/20
    = 3/5

  2. a) 6 5/12 : 2 3/4 + 11 1/4 . ( 1/3 – 1/5)
    = 2 1/3 + 11 1/4  . 2/15
    = 7/3 + 3/2
    = 23/6
    b) 5/16 : 0,25 – ( 2 1/4 – 0,6) . 10/11
    = 5/4 – 1 13/20 . 10/11
    = 5/4 – 3/2
    = -1/4
    c) 1.4 . 15/19 – ( 4/5 + 2/3) : 2 1/5
    = 21/19 – 22/15 : 2 1/5
    = 21/19 – 2/3
    = 25/57
    d) ( -1,2) . (-3/24) + ( 0,4 – 1 4/15) : 1 2/3
    =  3/20 + (-13/15) : 1 2/3
    = 3/20 +(-13/25)
    = -37/100
    e) 1 13/15 . 0,75 – ( 11/20 + 25%)
    = 7/5 – 4/5
    = 3/5
     

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

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