500 - { 5. [ 409-(8.3-21).3 ] } - 172
500-{5.[409-(8.3-21)^2 + 10^3]}:15 cứu bé với :((((
500 - {5.[409 - (8.3 - 21)2 + 103]} : 15
= 500 - {5.[409 - (24 - 21)2 + 1000]} : 15
= 500 - {5.[409 - 32 + 1000]} : 15
= 500 - {5.[409 - 9 + 1000]} : 15
= 500 - {5.[400 + 1000]} : 15
= 500 - {5.1400} : 15
= 500 - 7000 : 15
= 500 - 466
= 34
476-{5.[409-(8.3-21^2)]-1724}
776 -{5.[409-(8.3-21)2]-1724}
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 -{5.[409-(8.3-21^2)]-1724}
\(476-\left\{5.\left[409-\left(8.3-21^2\right)\right]-1724\right\}\)
\(=476-\left\{5.\left[409-\left(24-21\right)^2\right]-1724\right\}\)
\(=476-\left\{5.\left[409-3^2\right]-1724\right\}\)
\(=476-\left\{5.\left[409-9\right]-1724\right\}\)
\(=476-\left\{5.400-1724\right\}\)
\(=476-\left\{2000-1724\right\}\)
\(=476-276=200\)
D=500-{5.[409-(2^3 . 3 + 21)^2]-1724}
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 - (2^3 . 3 - 21) ^2] + 10^3} : 15
500 - { 5 [ 409 ( 2^3 . 3 - 21 )^2 ] + 10^3 } : 15
TL
-793.666666666667
HT
500 - { 5 [ 409 ( 23 . 3 - 21 )2 ] + 103 } : 15
= 500 - { 5 [ 409 ( 8 . 3 - 21 )2 ] + 1000 } : 15
= 500 - { 5 [ 409 ( 24 - 21 )2 ] + 1000 } : 15
= 500 - [ 5 ( 409 . 32 ) + 1000 ] : 15
= 500 - [ 5 ( 409 .9 ) + 1000 ] : 15
= 500 - ( 5 . 3618 + 1000 ) : 15
= 500 - ( 18405 + 1000 ) : 15
= 500 - 19405 : 15
= 500 \(-\frac{3881}{3}\)
= \(-\frac{2381}{3}\)
a) 17.(-25) + 25.21
b) 24.82+24.18-100
c) (-26)+48+(-34)+42
d) 476-{5.[409-(8.3-21)2 ]-1724}
làm ik mik tick nhìu cho
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
Bạn nào giải giúp mình bài này cái
1,Tính giá trị biểu thức:M=476-{5.[409-(8.3-21)mũ2]-1724}
2,cho S=3 + 3 mũ 2 +3 mũ 3 +....+ 3 mũ 2020 . Chứng minh S chia hết cho 4
cho A=2 mũ 0 + 2 mũ 1 + 2 mũ 2 + ...... +2 mũ 100 tổng A chia cho 7 dư mấy