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

Toán Lớp 6: tính nhanh (3^2021+24.3^2020) : 3^2019 12-{800:[ 537-(2^5+15.7)]} .1^2021 (3^2021+24.3^2021

Tháng Chín 9, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: tính nhanh
(3^2021+24.3^2020) : 3^2019
12-{800:[ 537-(2^5+15.7)]} .1^2021
(3^2021+24.3^2021

Comments ( 2 )

  1. tonhu12
    tonhu12
    9 Tháng Chín, 2022 at 8:42 sáng
    Reply
    (3^2021+24.3^2020):3^2019
    =3^2020(3+24):3^2019
    =3^2020 .27:3^2019
    =3^2020 .3^3:3^2019
    =3^2023:3^2019
    =3^4=81
    12-{800:[537-(2^5+15.7)]}.1^2021
    =12-{800:[537-(32+105)]}.1
    =12-{800:[537-137]}
    =12-{800:400}
    =12-2=10
    (3^2021+24.3^2021)
    =3^2021(1+24)
    =3^2021 .25
    =3^2021 .5^2

  2. ngoclanhoa
    ngoclanhoa
    9 Tháng Chín, 2022 at 8:41 sáng
    Reply
    ( 3^2021 + 24 * 3^2020 ) : 3^2019
    = [3^2020.( 3 + 24 )] : 3^2019
    = ( 3^2020. 27 ) : 3^2019
    = ( 3^2020 . 3^3 ) : 3^2019
    = 3^2023 : 3^2019 = 3^4 = 81
    12 – {800 : [537 – ( 2^5 + 15*7 )]} * 1^2021
    = 12 – { 800 : [ 537 – 137 ] * 1  
    = 12 – {800 : 400}*1
    = 12 – 2 * 1
    = 10  

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

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