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

Toán Lớp 7: Tính : 5: (-5/2)^2 + 2/15 . √ 9/4 – (-2021)^0 + | – 0,25 |

Toán Lớp 7: Tính :
5: (-5/2)^2 + 2/15 . √ 9/4 – (-2021)^0 + | – 0,25 |

Comments ( 2 )

  1. 5 : ( – 5/2 )^2 + 2/15 . \sqrt{9/4} – ( – 2021 )^0 + | – 0,25 |
    = 5 : 25/4 + 2/15 . 3/2 – 1 + 0,25
    = 0,8 + 0,2 – 0,75
    = 1 – 0,75
    = 0,25

  2. $ 5 : ( -5/2 )^2 + 2/15 . √9/4 – ( -2021)^0 + | -0,25 | $
    $ = 5 : 25/4 + 2/15 . 3/2 – 1 + 0,25 $ 
    $ = 5 . 4/25 + 1/5 – 1 + 0,25 $
    $ = 4/5 + 1/5 – 1 + 0,25 = 5/5 – 1 + 0,25 = 1 – 1 + 0,25 = 0 + 0,25 = 0,25 $
     

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