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47 - [(45 . 24 - 52 . 12) : 14]
= 47 - [(45 . 16 - 25 . 12) : 14]
= 47 - [(720 - 300 ) : 14]
= 47 - (420 : 14]
= 47 - 30
= 17
47 -[( 45 x 24- 52 x 12)] : 14
= 47- [( 45 x 16 - 25 x 12)] : 14
= 47- [( 720 - 300 )] : 14
= 47- 420 : 14
= 47- 30
= 17
\(47-\left[\left(45.2^4-5^2.12\right):14\right]\) \(50-\left[\left(20-2^3\right):2+34\right]\)
\(=47-\left[\left(45.16-25.12\right):14\right]\) \(=50-\left[\left(20-8\right):2+34\right]\)
\(=47-\left[\left(720-300\right):14\right]\) \(=50-\left[12:2+34\right]\)
\(=47-\left(420:14\right)=47-30\) \(=50-\left[6+34\right]=50-40\)
\(=17\) \(=10\)
a) \(47-\left[\left(45\cdot2^4-5^2\cdot12\right):14\right]\)
\(=47-\left[\left(45\cdot16-25\cdot12\right):14\right]\)
\(=47-\left[\left(720-300\right):14\right]\)
\(=47-\left[420:14\right]=47-30=17\)
a.=47-[45.16-25.12]:14]
=47-420:14
=47-30
=17
b.=50-[12:2+34]
=50-40
=10
c.=100-60:10
=100-6
=94
d.50-[(50-40);2+3]
=50-(10:2+3)
=50-8
=42
\(a)\)\(47-\left[\left(45.2^4-5^2.12\right)\div14\right]\)
\(=\)\(47-\left[\left(45.16-25.12\right)\div14\right]\)
\(=\)\(47-\left[\left(720-300\right)\div14\right]\)
\(=\)\(47-\left[420\div14\right]\)
\(=\)\(47-30\)
\(=\)\(17\)
\(b)\)\(10-\left[\left(8^2-48\right).5+\left(2^3.10+8\right)\right]\div28\)
\(=\)\(10-\left[\left(64-48\right).5+\left(8.10+8\right)\right]\div28\)
\(=\)\(10-\left[16.5+\left(80+8\right)\right]\div28\)
\(=\)\(10-\left[16.5+88\right]\div28\)
\(=\)\(10-\left[80+88\right]\div28\)
\(=\)\(10-168\div28\)
\(=\)\(10-6\)
\(=\)\(4\)
c) \(2345-1000:\left[19-2\left(21-18\right)^2\right]\)
= \(2345-1000:\left[19-2.3^2\right]\)
= \(2345-1000:\left[19-2.9\right]\)
= \(2345-1000:\left[19-18\right]\)
= \(2345-1000:1\)
= \(1345\)
47 - ( 45 . 24 - 52 . 12 ) :14
= 47 - ( 45 . 16 - 25 . 12 ) :14
= 47 - ( 720 - 300 ) :14
= 47 - 420 : 14
= 47 - 30
= 17