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

Toán Lớp 6: 2001 – (53 + 1579) – (-53) 35 – 17 + 2017 – 35 + (-2017) 37 + (-17) – 37 + 77

Toán Lớp 6: 2001 – (53 + 1579) – (-53)
35 – 17 + 2017 – 35 + (-2017)
37 + (-17) – 37 + 77

Comments ( 2 )

  1. $\text{a/ 2001 – (53 + 1579) – (-53)}$ $\\$ $\text{= 2001 – 53 – 1579 + 53}$ $\\$ $\text{= (2001 – 1579) + (-53 + 53)}$ $\\$ $\text{= 422}$ $\\$ $\text{b/ 35 – 17 + 2017 – 35 + (-2017)}$ $\\$ $\text{35 – 17 + 2017 – 35 – 2017}$ $\\$ $\text{= (35 – 35) + (2017 – 2017) – 17}$ $\\$ $\text{= -17}$ $\\$ $\text{c/ 37 + (-17) – 37 + 77}$ $\\$ $\text{= 37 – 17 – 37 + 77}$ $\\$ $\text{= (37 – 37) + (-17 + 77)}$ $\\$ $\text{= 60}$

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
        2001  –  ( 53 + 1579 )  –  ( -53 )
    =  2001  –  53  –  1579  + 53
    =  2000  +  1  –  1500  –  79
    =  500  –  79  +  1
    =  421  +  1
    =  422
        35  –  17  +  2017  –  35  +  ( -2017 )
    =  ( 35  –  35 ) – 17 + [ 2017 + ( -2017 )]
    =  0  –  17  +  0
    =  -17
         37 + (-17) – 37 + 77
    =  ( 37  –  37 )  +  ( -17  +  77 )
    =  0  +  60
    =  60

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