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

Toán Lớp 6: BT 1:tính A) 10 mũ hai -[60:(5 mũ 6 : 5 mũ 4 -3.5 )] B) 160 :{177 [ 3 mũ 2 .5-( 14 + 2 mũ 11 : 2 mũ 8)]} C) 500 – { 5 x [ 409 -( 2 mũ 2

Toán Lớp 6: BT 1:tính A) 10 mũ hai -[60:(5 mũ 6 : 5 mũ 4 -3.5 )]
B) 160 :{177 [ 3 mũ 2 .5-( 14 + 2 mũ 11 : 2 mũ 8)]}
C) 500 – { 5 x [ 409 -( 2 mũ 2 .3 -21) mũ 2 ] + 10 mũ 3 } : 15

Comments ( 2 )

  1. A) 10 ^2-[60:(5 ^ 6 : 5^4 -3.5 )]
    = 10 ^2-[60:(25 -3.5 )]
    = 10 ^2-(60:21,5)
    = 10 ^2-120/43
    =4180/43
    B) 160 :{177 .[ 3 ^ 2 .5-( 14 + 2 ^ 11 : 2 ^ 8)]}
    = 160 :{177 .[ 3 ^ 2 .5-( 14 + 8)]}
    = 160 :[177 .( 3 ^ 2 .5-22)]
    = 160 :[177 .( 45-22)]
    = 160 :(177. 23)
    = 160 :4071
    =160/4071
    C) 500 – { 5 . [ 409 -( 2 ^ 2 .3 -21) ^ 2 ] + 10 ^ 3 } : 15
    = 500 – { 5 . [ 409 -( 12 -21) ^ 2 ] + 10 ^ 3 } : 15
    = 500 – { 5 . [ 409 -( -9) ^ 2 ] + 10 ^ 3 } : 15
    = 500 – [ 5 . ( 409 -81 ) + 10 ^ 3 ] : 15
    = 500 – ( 5 . 328 + 10 ^ 3 ) : 15
    = 500 – ( 1640 + 10 ^ 3 ) : 15
    = 500 – 2640 : 15
    = 500 – 176
    =324
     

  2. A) 10^2 – [60 : (5^6 : 5^4 – 3 . 5)]
    = 100 – [60 : (25 – 3 . 5)]
    = 100 – [60 : 10]
    = 100 – 6
    = 94
    B) 160 : {177 [3^2 . 5 – ( 14 + 2^11 : 2^8)]}
    = 160 : {177 [9 . 5 – ( 14 + 2048 : 256)]}
    = 160 : {177 [9 . 5 – 22]}
    = 160 : {177 . 23}
    = 160 : 4071
    = 160/4071
    C) 500 – { 5 × [ 409 – ( 2^2 . 3 – 21)^2 ] + 10^3 } : 15
    = 500 – { 5 × [ 409 – (-9)^2 ] + 1000 } : 15
    = 500 – { 5 × [ 409 – 81 ] + 1000 } : 15
    = 500 – { 5 × 328 + 1000 } : 15
    = 500 – 2640 : 15
    = 500 – 176
    = 324
     

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

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