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a)\(\left(5^{23}.5^{18}\right):5^{39}-5^0.0^5\)
= \(5^{41}:5^{39}-1.0\)
= \(5^2-0\)
= \(25-0=25\)
b)\(\left[2.3^3+144:\left(7^2-925:5^2\right)\right].\left|-8\right|\)
= \(\left[2.27+144:\left(49-925:25\right)\right].8\)
= \(\left[54+144:\left(49-37\right)\right].8\)
= \(\left[54+144:12\right].8\)
= \(\left[54+12\right].8\)
= \(66.8\)
= 528
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a) 33 + 32 - ( 27 : 25 + 78 : 77 )
= 27 + 9 - ( 22 + 7 )
= 36 - 11
= 25
b) 27 . 77 + 27 . 27 - 27
= 27 . 77 + 27 . 27 - 27 . 1
= 27( 77 + 27 - 1 )
= 27 . 103
= 2781
c) 52 : ( 43 - 30 ) + 144 - 16
= 52 : 13 + 144 - 16
= 4 + 144 - 12
= 136
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{ 2 . 32 + [ 144 - 52 . ( 15 - 169 : 13 ) ] } - 12019
= { 2 . 9 + [ 144 - 25 . ( 15 - 13 ) ] } - 1
= { 18 + [ 144 - 25 . 2 ] } - 1
= { 18 + [ 144 - 50 ] } - 1
= 18 + 94 - 1
= 112 - 1
= 111
{2 . 3^2 + (144 - 5^2 . (15 - 169 : 13))} - 1^2019
= {2 . 9 + (144 - 25 . ( 15 - 169 : 13))} - 1
= {2 . 9 + (144 - 25 . ( 15 - 13))} - 1
= {2 . 9 + (144 - 25 . 2)} - 1
= {2 . 9 + (144 - 50)} - 1
= {2 . 9 + 94} - 1
= {18 + 94} - 1
= 112 - 1
= 111
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1. 25 : 5,7 = 250/57
2. 30:2.8.4 = 480
3. 20:2^2.14= 70
4. 125:5^3.170= 170
5. 64:2^5.30.4=240
6. (25:5^2.30): 15.7=14
bạn à! Nhiều quá mình ko làm hết được. sorry nha.^-^
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\(\left(2\cdot3^2+\left(144-5^2\cdot\left(15-169:13\right)\right)\right)-9999^0\)
\(=\left(2\cdot9+\left(144-25\cdot\left(15-13\right)\right)\right)-1\)
\(=\left(18+\left(144-25\cdot2\right)\right)-1\)
\(=\left(18+\left(144-50\right)\right)-1\)
\(=\left(18+94\right)-1\)
\(=112-1\)
\(=111\)
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