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

Toán Lớp 7: `5/7-5/21+1 2/3-(1 1/2-5/14-1/3)+|1/6-4/3|`

Tháng Chín 10, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: 5/7-5/21+1 2/3-(1 1/2-5/14-1/3)+|1/6-4/3|

Comments ( 2 )

  1. mocmien87
    mocmien87
    10 Tháng Chín, 2022 at 8:31 chiều
    Reply
    5/7-5/21+1 2/3-(1 1/2-5/14-1/3)+|1/6-4/3|
    =15/21-5/21+5/3-(3/2-5/14-1/3)+|1/6-8/6|
    =10/21+5/3-(21/14-5/14-1/3)+|(-7)/6|
    =10/21+35/21-(8/7-1/3)+7/6
    =15/7-(24/21-7/21)+7/6
    =15/7-17/21+7/6
    =45/21-17/21+7/6
    =4/3+7/6
    =8/6+7/6
    =15/6=5/2

  2. tuyetnhungthu
    tuyetnhungthu
    10 Tháng Chín, 2022 at 8:30 chiều
    Reply
    5/7 – 5/21 + 1 2/3 – (1 1/2 – 5/14 – 1/3) + |1/6 – 4/3|
    = 5/7 – 5/21 + 5/3 – (3/2 – 5/14 – 1/3) + |1/6 – 4/3|
    = 10/21 + 5/3 – (8/7- 1/3) + |-7/6|
    = 10/21 + 5/3 – 17/21 + 7/6
    = (10/21 – 17/21) + (5/3 + 7/6)
    = -1/3 + 17/6
    = 5/2
     

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

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