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

Toán Lớp 6: B1 : Tính hợp lí a. 5/11 + 6/11 × 7/3 – 6/11 ×4/3 b. 7/25 × 3/4 + 7/25 × 1/4 – 32/ 35

Tháng Mười Hai 5, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: B1 : Tính hợp lí
a. 5/11 + 6/11 × 7/3 – 6/11 ×4/3
b. 7/25 × 3/4 + 7/25 × 1/4 – 32/ 35

Comments ( 2 )

  1. tuenhioanh
    tuenhioanh
    5 Tháng Mười Hai, 2022 at 9:20 chiều
    Reply
    a)
    5/11 + 6/11 × 7/3 – 6/11 × 4/3
    = 5/11 + 6/11 × (7/3 – 4/3)
    = 5/11 + 6/11 × 1
    = 5/11 + 6/11
    = 1
    b)
    7/25 × 3/4 + 7/2 × 1/4 – 32/35
    = 7/25 × (3/4 + 1/4) – 32/35
    = 7/25 – 32/35
    = (245 – 800)/875
    = -555/875
    = -111/175

  2. huyenmi76
    huyenmi76
    5 Tháng Mười Hai, 2022 at 9:19 chiều
    Reply
    a)5/11 + 6/11 . 7/3 – 6/11 . 4/3
    =5/11 + 6/11 . (7/3 – 4/3)
    =5/11 + 6/11 . 1
    =5/11 + 6/11
    =1
    b)7/25 . 3/4 + 7/25 . 1/4 – 32/35
    =7/25 . ( 3/4 + 1/4 ) – 32/35
    =7/25 . 1 – 32/35
    =245/875 – 800/875
    =-555/875
    =-111/175
     

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

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