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

Toán Lớp 6: Bài 1: thực hiện phép tính. A. 260:(5+7.(72:2³-6))-3²

Toán Lớp 6: Bài 1: thực hiện phép tính.
A. 260:(5+7.(72:2³-6))-3²

Comments ( 2 )

  1. $\text{a) 260 : [5 + 7 . ( 72 : 2³ – 6 )] – 3²}$
    $\text{= 260 : [5 + 7 . ( 72 : 8 – 6 )] – 9}$
    $\text{= 260 : [5 + 7 . ( 9 – 6 )] – 9}$
    $\text{= 260 : [5 + 7 . 3] – 9}$
    $\text{= 260 : [5 + 21] – 9}$
    $\text{= 260 : 26 – 9}$
    $\text{= 10 – 9}$
    $\text{= 1}$

  2. a. 260 : [ 5 + 7 .(72 : 2³ – 6 ) ] – 3²
    = 260 : [5 + 7.(72 : 8 – 6 ) ]- 9
    = 260 : [ 5 + 7. 3 ] – 9
    = 260 : [ 5 + 21 ] – 9
    = 260 : 26 – 9
    = 10 – 9 
    = 1
    chúc bạn học tốt!
    Cho mình 5 sao + ctlhn nha!Cảm ơn bạn!
    @nphuongngan451
     

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