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a)= 24x5^5+5^5=5^5(24+1)=5^5x5^2=5^7
b)=21x3^8+9x3^8+51x3^8=3^8(21+9+51)=3^8x3^4=3^12
sau 58 ,7,50 ,2,-60 là phép tính khác .
mấy b giúp mk nha ?
e) \(5^{13}:5^{10}-25.2^2\)
\(=5^3-5^2.2^2\)
\(=5^2\left(5-2^2\right)\)
\(=25\)
e) 513 : 510 - 25 . 22 f) 20:22+59:58 g) 100+ 52+ 7.32 h) 84:4+39:37+50 i) 29- [16+ 3. (51- 49)]
= 53 - 25 . 4 = 20 :4 + 5 = 100+ 25+ 7.9 = 21+ 32+ 1 = 29- [16+ 3.2 ]
=125 - 100 = 5+ 5 = 125+ 63 = 21+ 9+ 1 = 29- [16+ 6]
=25 = 10 = 188 = 31 = 29 - 22
=7
\(\left(5^7+5^9\right)\left(6^8+6^{10}\right)\left(2^4-4^2\right)=\left(5^7+5^9\right)\left(6^8+6^{10}\right)\left(16-16\right)=0\)
\(\left(7^3+7^5\right)\left(5^4+5^6\right)\left(3^3.3-9^2\right)=\left(7^3+7^5\right)\left(5^4+5^6\right)\left[3^4-\left(3^2\right)^2\right]\)
\(=\left(7^3+7^5\right)\left(5^4+5^6\right)\left(3^4-3^4\right)=0\)
a) \(\left(3^5\times3^7\right):3^{10}+5\times2^4-7^3:7=3^{12}:3^{10}+5\times2^4-7^2\)
\(=3^2-5\times16-7^2=9-80-49=-120\)
b) \(15:\left(3^5:3^4\right)-2^9:2^7=15:3-2^2=5-4=1\)
c)\(5\times3^5:\left(3^8:3^5\right)-2^3\times5=5\times3^5:3^3-2^3\times5\)
\(=5\times3^2-2^3\times5=5\times9-8\times5=45-40=5\)
a)5.4.9-6^2=180-36=144
b)15:3-2^2=5-4=1
c)5.3^5:3^3-8.5=5.3^2-40=5.9-40=45-40=5
a)mk ko bt
b)15 * 35 / (35 / 34 ) - 23 *5
=15 / 3 - 4
=5 - 4
=1
c) 5 * 35 / (38 / 35 ) - 23 * 5
=5 * 35 / 27 - 23 * 5
=1215 / 27 - 40
=45 - 40
=5
d) 4* [(3 + 37 + 34)*10 + 97]-300
=4*[(3+2187+81)*10+97]-300
=4*[(2190+81)*10+97]-300
=4*[2271*10+97]-300
=4*[22710+97]-300
=4*22807-300
=9128-300
=90928
78125
531441