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

Toán Lớp 6: Thực hiện phép tính a) 2.52 – 176 : 23 b) 17.5 + 7.17 – 16.12 c) 2015 + [38 – (7 – 1)2] – 20170 Giup mình zới

Toán Lớp 6: Thực hiện phép tính
a) 2.52 – 176 : 23
b) 17.5 + 7.17 – 16.12
c) 2015 + [38 – (7 – 1)2] – 20170
Giup mình zới

Comments ( 1 )

  1. a) 2 . 52 – 176 : 23 = 104 – 176/23 = 2216/23
    b) 17 . 5 + 7 . 17 – 16 . 12 = 17 .(5 + 7) – 16 . 12
                                             = 17 . 12 – 16 . 12
                                             = 12.(17 – 16) = 12 . 1 = 12
    c) 2015 + [38 – (7 – 1).2] – 20170
    = 2015 + (38 – 6 . 2) – 20170
    = 2015 + (38 – 12) – 20170
    = 2015 + 26 – 20170
    = 2041 – 20170
    = -18129  
     

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

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