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

Toán Lớp 6: a) -7/25 . 39/-14 . 50/78 b) 6/7 . 8/13+ 6/13. 9/7 -3/13. 6/7 c) ( -9/ 25) . 5 mũ 3/ 3 – ( -3/5) mũ 2 . 22/3

Tháng Một 23, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: a) -7/25 . 39/-14 . 50/78
b) 6/7 . 8/13+ 6/13. 9/7 -3/13. 6/7
c) ( -9/ 25) . 5 mũ 3/ 3 – ( -3/5) mũ 2 . 22/3

Comments ( 2 )

  1. cattien
    cattien
    23 Tháng Một, 2023 at 10:33 chiều
    Reply

    ~ Chúc bạn học tốt ~
    toan-lop-6-a-7-25-39-14-50-78-b-6-7-8-13-6-13-9-7-3-13-6-7-c-9-25-5-mu-3-3-3-5-mu-2-22-3

  2. ngocle44
    ngocle44
    23 Tháng Một, 2023 at 10:33 chiều
    Reply
    a, ( – 7 )/25 . 39/-14 . 50/78
    = ( ( – 7 ) . 39 . 50 )/( 25 . ( – 14 ) . 78 )
    = ( ( – 7 ) . 39 . 2 . 5 . 5 )/( 5 . 5 . 2 . ( – 7 ) . 39 . 2 )
    =  1/2
    b, 6/7 . 8/13 + 6/13 . 9/7 – 3/13 . 6/7
    = 6/7 . ( 8/13 – 3/13 ) + ( 6 . 9 )/( 7 . 13 )
    = 6/7 . 5/13 + 6/7 . 9/13
    = 6/7 . ( 5/13 + 9/13 )
    = 6/7 . 14/13
    = 12/13
    c, ( ( – 9 )/25 . 5^3 )/( 3 – ( ( – 3 )/5 )^2 . 22/3 )
    = ( ( – 9 )/25 . 125 )/( 3 – 9/25 . 22/3 )
    = ( – 45 )/( 3 –  66/25 )
    = ( – 45 )/( 9 /25 )
    = ( – 45 ) : 9/25 = – 125

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

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