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1500 - { 53 . 23 - 11. [ 72 - 5.23 + 8..( 112 - 121 )]}
= 1500 - ( 5.2 )3 - 11. [ 49 - 40 + 8. 0 ]}
= 1500 - 103 - 11. 9
= 1500 - 1000 - 99
= 401
Chúc bn hc tốt <3
1500-{53.23-11.[72-5.23+8.(112-121)]}
= 1500-{125.8-11.[49-5.8+8.(121-121)]}
= 1500-{1000-11.[49-40+8.0]}
= 1500-{1000-11.[9+0]}
= 1500-{1000-11.9}
= 1500-{1000-99}
= 1500-901
= 599
Chúc bn học tốt! Kick cho mik nhé!
\(A=-1500-\left\{5^3.2^3-11.\left[7^2-5.2^3+8\left(11^2-121\right)\right]\right\}.\left(-2\right)\)
\(A=-1500-\left\{\left(10\right)^3-11\left[49-40+8.0\right]\right\}\left(-2\right)\)
\(A=-1500-\left\{1000-11.9\right\}\left(-2\right)\)
\(A=-1500-\left(901\right)\left(-2\right)\)
\(A=-1500+1802\)
\(A=302\)
vậy \(A=302\)
1500- { 53 . 23- 11. [ 72 - 5 . 23 + 8.( 112 - 121)]}
=1500- { 53 . 23- 11. [ 72 - 5 . 23 + 8.( 121 - 121)]}
=1500- { 53 . 23- 11. [ 72 - 5 . 23 + 8.0 ]}
=1500- { 53 . 23- 11. [ 49 - 5 . 8 + 0 ]}
=1500- { 53 . 23- 11. [ 49 - 40 + 0 ]}
=1500- { 53 . 23- 11. [ 9 + 0 ]}
=1500- { 53 . 23- 11. 9 }
=1500- { 125 . 8 - 11. 9 }
=1500- { 1000 - 99 }
=1500- 901
=599
BÀI HƠI DÀI TÍ
CỐ GẮNG LÊN BẠN NHÉ
= - 1500 - { 125.8 - 11[ 49 - 5.8 + 8.(121-121) ] } . ( - 2 )
= - 1500 - (1000 - 11.9) ( - 2 )
= - 1500 - 901.( - 2 )
= - 1500 + 1802
= 302
-3/11.(-22)/66.121/15
=(-3).(-22).121
11.66.15
=11
15
3/7.2/5.7/3.20.19/72
=3.2.7.20.19
7.5.3.72
=76
16
6/7.8/13+6/13.9/7-3/13.6/7
=6/7.8/13+6/7.9/13-3/13.6/7
=6/7.(8/13+9/13-3/13)
=6/7.14/13
=12/13
-1/4.152/11+68/4.(-1)/11
=152/4.(-1)/11+68/4.(-1)/11
=(-1)/11.(152/4+68/4)
=(-1)/11.220/4
=-110/22
-5/7.2/11+(-5)/7.9/11+12/7
=-5/7.2/11+-5/7.9/11+12/7
=-5/7.(2/11+9/11)+12/7
=-5/7.1+12/7
=(-5)/7+12/7
=7/7
=1
146/13-(18/7+68/13)
=146/13-18/7-68/13
=(146/13-68/13)-18/7
=78/13-18/7
=6-18/7
=42/7-18/7
=24/7
a.
\(1500-\left\{5^3.2^3-11\left[7^2-5.2^3+8\cdot\left(11^2-121\right)\right]\right\}\)
\(=1500-\left\{\left(5.2\right)^3-11\left[9+8\left(11^2-11^2\right)\right]\right\}\)
\(=1500-\left\{10^3-11.9\right\}\)
\(=1500-901=599\)
b/
\(S=5+5^2+5^3+...+5^{2012}\)
\(5S=5^2+5^3+5^4+...+5^{2013}\)
\(4S=5S-S=5^{2013}-5\)
\(S=\frac{5^{2013}-5}{4}\)
a ; 1500 - { 5 ^ 3 . 2 ^ 3 - 11 [ 7 ^ 2 - 5 . 2 ^ 3 + 8 ( 11 ^ 2 - 121) ] }
a ; 1500 - { 5 ^ 3 . 2 ^ 3 - 11 [ 7 ^ 2 - 5 . 2 ^ 3 + 8 ( 121 - 121) ] }
a ; 1500 - [ 5 ^ 3 . 2 ^ 3 - 11 ( 7 ^ 2 - 5 . 2 ^ 3 + 8 . 0 ) ]
a ; 1500 - [ 5 ^ 3 . 2 ^ 3 - 11 ( 49 - 5 .8 + 8 . 0) ]
a ; 1500 - [ 5 ^ 3 . 2 ^ 3 - 11 ( 49 - 40 + 0 ) ]
a ; 1500 - ( 5 ^ 3 . 2 ^ 3 - 11 . 9 )
a ; 1500 - [ ( 5 . 2 ) ^ 3 - 99]
a ; 1500 - ( 10 ^ 3 - 99)
a ; 1500 - ( 1000 - 99)
a ; 1500 - 901
a = 599