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a)27^6:9^3=(3^3)^6:(3^2)^3=3^18:3^6=3^12
b)4^20:2^15=(2^2)^20:2^15=2^40:2^15=2^25
a) 27^6 : 9^3
= ( 3^3)^6 : ( 3^2)^3
= 3^18 : 3^6
= 3^12
b) 4^20 : 2^15
= ( 2^2)^20 : 2^15
= 2^40 : 2^15
= 2^25
d) 64^4 x 16^5 : 4^20
= (4^3)^4 x (4^2)^5 : 4^20
= 4^12 x 4^10 : 4^20
= 4^22 : 4^20
= 4^2
a,�,
220.15+210.85220.15+210.85
=220.210.85+15=220.210.85+15
=230.100=230.100
=230.102=230.102
b,�,
2716:9102716:910
=(33)16:(32)10=(33)16:(32)10
=348:320=348:320
=328=328
c,�,
1253:2541253:254
=(53)5:(52)4=(53)5:(52)4
=515:58=515:58
=57=57
d,�,
244:34−3212:1612244:34−3212:1612
=(24:3)4−(32:16)12=(24:3)4−(32:16)12
=84−212=84−212
=(23)4−212=(23)4−212
=212−212=212−212
a) 274.93 = (92)4.93 = 98.93 = 911
b) 72018 : 7 = 72017
c) 420 : 40 = 420
d) (38.315) : ( 37.314) = 323 : 321 = 32
e) (215 : 210) : (218 : 215) = 25 : 23 = 22
f) ( 416. 42) : (420 :42)
g) 254 : 125
a) \(27^4.9^3=\left(3^3\right)^4.\left(3^2\right)^3=3^{12}.3^6=3^{12+6}=3^{18}\)
b) \(7^{2018}:7=7^{2018-1}=7^{2017}\)
c) \(4^{20}:4^0=4^{20}:1=4^{20}\)
d) \(\left(3^8.3^{15}\right):\left(3^7.3^{14}\right)=3^{8+15}:3^{7+14}=3^{23}:3^{21}=3^{23-21}=3^2\)
e) \(\left(2^{15}:2^{10}\right):\left(2^{18}:2^{15}\right)=\frac{2^{15-10}}{2^{18-15}}=\frac{2^5}{2^3}=2^{5-3}=2^2\)
f) \(\left(4^{16}.4^2\right):\left(4^{20}:4^2\right)=4^{16+2}:4^{20-2}=4^{18}:4^{18}=1\)
g) \(25^4:125=\left(5^2\right)^4:5^3=5^8:5^3=5^{8-3}=5^5\)
ôi quá dễ nếu mình có thời gian thì mình sẽ làm nhưng giờ mình chẳng có thời gan
a) 53.252:54
= 53.(52)2:54
= 53.54:54
= 53+4-4
= 53
b) 42.(23)2:128
= (22)2.26:27
= 24.26:27
= 24+6-7
= 23
c) 35.243:(32)3
= 35.35:36
= 35+5-6
= 34
d) 205:55
= (20:5)5
= 45
e) 410:810 (Có chắc không vậy ? Hay là 810:410 ?)
g) 415.530
= 415.(52)15
= 415.2515
= (4.25)15
= 10015
h) 2716.910
= (33)16.(32)10
= 348.320
= 348+20
= 368
a, \(7^{2010}:7=7^{2009}\)
b, \(4^{20}:4^0=4^{20}\)
c, \(\frac{3^8.3^{15}}{3^7.3^{14}}=\frac{3^{23}}{3^{21}}=3^2\)
d, \(\frac{4^{16}.4^2}{4^{20}:4^2}=\frac{4^{18}}{4^{18}}=4^0\)
e, \(\frac{2^{15}:2^{10}}{2^{18}:2^{15}}=\frac{2^5}{2^3}=2^2\)
f, \(25^4:125=\left(5^2\right)^4:5^3=5^8:5^3=5^5\)
a)72009
b)420
c)32
d)40
e)22
f)252