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

Toán Lớp 7: Tính nhanh: `1/2 . (2/7 – 5/3) – 1/3 . (1/2 – 18/7)`

Home/ Toán Lớp 7: Tính nhanh: `1/2 . (2/7 – 5/3) – 1/3 . (1/2 – 18/7)`

Toán Lớp 7: Tính nhanh: `1/2 . (2/7 – 5/3) – 1/3 . (1/2 – 18/7)`

Tháng Hai 26, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: Tính nhanh:
1/2 . (2/7 – 5/3) – 1/3 . (1/2 – 18/7)

Comments ( 2 )

  1. hoquyly
    hoquyly
    26 Tháng Hai, 2022 at 9:26 sáng
    Reply
    1/2 . ( 2/7 – (5)/3 ) – (1)/3 . (1/2 – (18)/7)
    = 1/2 . 2/7 – (1)/2 . 5/3 – (1)/3 . 1/2 + 1/3 . 18/7
    = 1/7 – 5/6 – 1/6 + 6/7
    = ( 1/7 + 6/7 ) – ( 5/6 + (1)/6)
    = 7/7 – 6/6
    = 1 – 1
    = 0
     

  2. khanhngantoan
    khanhngantoan
    26 Tháng Hai, 2022 at 9:26 sáng
    Reply
    Tham khảo ạ và hoàn toàn nhanh !
     

    toan-lop-7-tinh-nhanh-1-2-2-7-5-3-1-3-1-2-18-7

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

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