D=500-{5.[409-(2^3-21)^2]-1724}.
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D = 500 - {5.[409 - (23 . 3 + 21)2] - 1724}
D = 500 - {5.[409 - (8 . 3 + 21)2] - 1724}
D = 500 - {5.[409 - (24 + 21)2] - 1724}
D = 500 - {5.[409 - 452] - 1724}
D = 500 - {5.[409 - 2025] - 1724}
D = 500 - {5.(-1616) - 1724}
D = 500 - {-8080 - 1724}
D = 500 - (-9804)
D = 500 + 9804
D = 10304
D=500-\(\left\{5\cdot[409-\left(2^3\cdot3+21\right)^2-1724\right\}\)=500-\(\left\{5\cdot[409-45^2-1724]\right\}\)
=500-\(\left\{5\cdot[409-2025-1724]\right\}\)=500-\(\left\{5\cdot\left(-3340\right)\right\}\)=500+16700=17200.
500-{5.(409-(2³x3-21)²]-1724}
= 500-{5.(409-(8x3-21)²]-1724}
=500-{5.(409-(24-21)²]-1724}
=500-{5.(409-3²)-1724}
=500-{5.(409-9)-1724}
=500-{5.400-1724}
=500-{2000-1724}
=500-276
=224
Hok tốt!
a: Ta có: \(142-\left[50-\left(2^3\cdot10-2^3\cdot5\right)\right]\)
\(=142-\left[50-80+40\right]\)
=142-10
=132
a. 142 - [50-(23.10-23.5)]
= 142 - [ 50 - ( 8 . 10 - 8 . 5 )]
= 142 - [ 50 - ( 80 - 40 )]
= 142 - [ 50 - 40 ]
= 142 - 10 = 132
b. 375 : { 32[ 4+(5.32 - 42 )]} - 14
= 375 : { 32[4+(5.9 - 42 )]} - 14
= 375 : { 32[4 + ( 45 - 42 )]} - 14
= 375 : {32[4+3]} - 14
= 375 : 224 - 14
c.{210 : [ 16+3.(6+3.2^2)]} - 3
= {210 : [ 16 + 3.(6+3.4)]} - 3
= { 210 :[16+3.(6+12)]}-3
= {210 : [ 16+3.18)]} - 3
= { 210 : [ 16 + 54]} - 3
= { 210 : 70 } - 3
= 30 - 3 = 27
d.500-{5.[409-(2^3 . 3-21^2)] - 1724}
= 500-{5.[409-(8 . 63 - 21^2] - 1724}
= 500 - { 5.[409- (504 - 441) - 1724}
= 500 -{ 5.[ 409 - 63 ] - 1724}
= 500 - { 5.346 - 1724}
= 500 - { 1720 - 1724 }
= 500 - 6
= 494
776 - { 5. [ 409 - (8.3 - 212)] - 1724}
= 776 - { 5.[ 409 - (24 - 441)] - 1724}
= 776 - { 5.[ 409 + 417] - 1724}
= 776 - {5. 826 - 1724}
= 776 - 2406
= - 1630
\(476-\left\{5.\left[409-\left(8.3-21^2\right)\right]-1724\right\}\)
\(=476-\left\{5.\left[409-\left(24-21\right)^2\right]-1724\right\}\)
\(=476-\left\{5.\left[409-3^2\right]-1724\right\}\)
\(=476-\left\{5.\left[409-9\right]-1724\right\}\)
\(=476-\left\{5.400-1724\right\}\)
\(=476-\left\{2000-1724\right\}\)
\(=476-276=200\)
Thực hiện phép tính
1. [ 36 . 4 - 4 . ( 82 - 7 . 11 )2] : 4 - 20190
= [ 36 . 4 - 4 . 25 ] : 4 - 1
= [ 4.(36 - 25)] : 4 - 1
= 44 : 4 - 1
= 11 - 1
= 10
2. 500 - { 5 . [ 409 - ( 23. 3 - 21 )3] - 1724 }
a) 17.(-25) + 25.21
= (-17).25 + 25.21
= 25.[(-17) + 21]
= 25.4
= 100
b) 24.82 + 24.18 - 100
= 24.(82 + 18) - 100
= 24.100 - 100
= 2400 - 100
= 2300
c) (-26) + 48 + (-34) + 42
= [(-26) + (-34)] + (48 + 42)
= (-60) + 90
= 30
d) 476 - {5.[409 - (8.3 - 21)2] - 1724}
= 476 - {5.[409 - (24 - 21)2] - 1724}
= 476 - {5.[409 - 32] - 1724}
= 476 - {5.[409 - 9] - 1724}
= 476 - {5.400 - 1724}
= 476 - {2000 - 1724}
= 476 - 276
= 200
`D = 500 - {5 . [409 - (2^3 - 21)^2] - 1724}`
`D = 500 - {5 . [409 - (8 - 21)^2] - 1724}`
`D = 500 - {5 . [409 - (-13)^2] - 1724}`
`D = 500 - {5 . [409 - 169] - 1724}`
`D = 500 - {5 . 240 - 1724}`
`D = 500 - {1200 - 1724}`
`D = 500 - (-524)`
`D = 500 + 524`
`D = 1024`