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

Toán Lớp 6: 2021^1- {15^2: [ 175+ ( 2^3.5^2 – 6.25)]}

Toán Lớp 6: 2021^1- {15^2: [ 175+ ( 2^3.5^2 – 6.25)]}

Comments ( 2 )

  1. 2021^1 – { 15^2 : [ 175 + ( 2^3 . 5^2 – 6 . 25 ) ] }
    = 2021 – { 15^2 : [ 175 + ( 8 . 25 – 6 . 25 ) ] }
    = 2021 – { 15^2 : [ 175 + ( 25 . ( 8 – 6 ) ) ] }
    = 2021 – { 15^2 : [ 175 + ( 25 . 2 ) ] }
    = 2021 – { 15^2 : [ 175 + 50 ] }
    = 2021 – { 225 : 225 }
    = 2021 – 1
    = 2020

  2. Giải đáp+Lời giải và giải thích chi tiết:
    2021^1- {15^2: [ 175+ ( 2^3. 5^2 – 6.25)]}
    = 2021- {225: [ 175+ (8 . 25- 6. 25)]}
    = 2021- {225: [ 175+ 25 . (8-6)]}
    = 2021- {225: [ 175+ (25 .2)]}
    = 2021- {225: [ 175+ 50]}
    = 2021- {225: 225}
    = 2021-1
    = 2020
     

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