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a: \(=\left(5^2+3\right):7=4\)
b: \(=7^2-3^2+8\cdot25=40+200=240\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(=\left(5^2+3\right):7=28:7=4\)
b: \(=7^2-3^2+8\cdot25\)
=49-9+200
=240
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(\left(5^{19}:5^{17}+3\right):7=\left(5^2+3\right):7=4\)
b: \(7^9:7^7-3^2+2^3\cdot5^2\)
\(=7^2-3^2+8\cdot25\)
=49-9+200
=240
c: \(1200:2+6^2\cdot2^1+18\)
\(=600+72+18\)
=690
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(5^{19}:5^{17}+3\right):7\)
\(=\left(5^2+3\right):7\)
\(=\left(25+3\right):7\)
\(=28:7\)
\(=4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
c) (519 - 17 + 3) : 7
= (52 + 3) : 7
= (25 + 3) : 7
= 28 : 7
= 4
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\(48\div4+3^9\div3^7+5^0\)
\(=12+9+1\)
\(=22\)
\(\left(5^{19}\div5^{17}+3\right)\div7\)
\(=\left(25+3\right)\div7\)
\(=28\div7\)
\(=4\)
\(295-\left(32-2^2\times5\right)^2\)
\(=295-144\)
\(=151\)
\(6^2\div9+50\times2-3^3\times3\)
\(=36\div9+100-27\)
\(=4+100-27\)
\(=100-27\)
\(=73\)
48:4+39:37+50
=48:4+32+1
=12+9+1=22
(519:517+3):7
=(52+3):7
=(25+3):7
=28:7=4
295-(31-22.5)2
=295-(31-4.5)2
=295-(31-20)2
=295-112
=295-121
=174
62:9+50.2-33.3
=36:9+50.2-34
=4+100-81
=23
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a) 20 : 2 2 − 5 9 : 5 8 = 5 − 5 = 0
b) ( 5 19 : 5 17 − 4 ) : 7 0 = ( 5 2 − 4 ) : 1 = 21
c) 295 − ( 31 − 2 2 .5 ) 2 = 295 − 11 2 = 174
a,(5^2+3):7
=(25+3) :7
=28 :7
=4