ở đây nha bn : /hoi-dap/question/119629.html

b,(723+277).2001-(456+544).1010-389-611

=1000.2001-1000.1010-(389+611)

=1000.2001-1000.1010-1000

=1000.(2001-1010-1)

=1000.990

=990000

a, 9².53+12.9²-81+36.9²

=9².(53+12+36)-81

=81.101-81

=8181-81

=8100

8⁴.16⁵=2³²

5⁴⁰.125².25³=5⁵²

27⁴.81¹⁰=3⁵²

10³.100⁵.1000⁴=10²⁵

Chúc hk tốt!!!

+) \(8^4\times16^5=\left(2^3\right)^4\times\left(2^4\right)^5=2^{12}\times2^{20}=2^{12+20}=2^{32}\)

+) \(5^{40}\times125^2\times25^3=5^{40}\times\left(5^3\right)^2\times\left(5^2\right)^3=5^{40}\times5^6\times5^6=5^{40+6+6}=5^{52}\)

+) \(27^4\times81^{10}=\left(3^3\right)^4\times\left(3^4\right)^{10}=3^{12}\times3^{40}=3^{12+40}=3^{52}\)

+) \(10^3\times100^5\times1000^4=10^3\times\left(10^2\right)^5\times\left(10^3\right)^4=10^3\times10^{10}\times10^{12}=10^{3+10+12}=10^{25}\)

_Chúc bạn học tốt_

\(125^5=\left(5^3\right)^5=5^{3\cdot5}=5^{15}\\ 25^7=\left(5^2\right)^7=5^{2\cdot7}=5^{14}\\ 5^{15}>5^{14}\Rightarrow125^5>25^7\)

Vậy ...

\(3^{54}=3^{2\cdot27}=\left(3^2\right)^{27}=9^{27}\\ 2^{81}=2^{3\cdot27}=\left(2^3\right)^{27}=8^{27}\\ 9>8\Rightarrow9^{27}>8^{27}\Rightarrow3^{54}>2^{81}\)

Vậy ...

\(10^{30}=10^{3\cdot10}=\left(10^3\right)^{10}=1000^{10}\\ 2^{100}=2^{10\cdot10}=\left(2^{10}\right)^{10}=1024^{10}\\ 1024>1000\Rightarrow1024^{10}>1000^{10}\Rightarrow2^{100}>10^{30}\)

Vậy ...

\(5^{40}=5^{4\cdot10}=\left(5^4\right)^{10}=625^{10}\\ 620< 625\Rightarrow620^{10}< 625^{10}\Rightarrow620^{10}< 5^{40}\)

Vậy ...

a,81^13>32^5

b,25^9<125^6

c,10^30>2^100

d,2^161<5^200

e,13^40>2^161

g)1^100>33^6

hãy ghi cả cách so sánh

25 - (20 - 10)=15

80 - (30 + 25)=25

125 + (13 + 7)=145

416 - (25 - 21)=412

(65 + 15) x 2=160

46 : (6 : 3)=23

(74 - 14) : 2=30

81 : (3 x 3)=9

123 x (42 - 40)=246

(100 + 11) x 9=999

72 : (2 x 4)=9

64 : (8 : 4)=32

15

25

145

412

160

23

30

9

246

999

9

32

a, 4¹⁰. 2³⁰=2²⁰.2³⁰=2⁵⁰

b,9²⁵.27⁴.81³= 3⁵⁰.3¹².3¹²=3⁷⁴

Tương tự các câu khác....

a, 4¹⁰.2³⁰ = (2²)¹⁰.2³⁰ = 2²⁰.2³⁰ = 2⁵⁰
b, 9²⁵.27⁴.81³ = (3²)²⁵.(3³)⁴.(3⁴)³ = 3⁵⁰.3¹².3¹² = 3⁷⁴
c, 25⁵⁰.125⁵ = (5²)⁵⁰.(5³)⁵ = 5¹⁰⁰.5¹⁵ = 5¹¹⁵
d, 64³.4⁸.16⁴ = (2⁶)³.(2²)⁸.(2⁴)⁴ = 2¹⁸.2¹⁶.2¹⁶ = 2⁵⁰
e, 3⁸ : 3⁶ = 3²
2¹⁰ : 8³ = 2¹⁰ : (2³)³ = 2¹⁰ : 2⁹ = 2
12⁷ : 6⁷ = (12 : 6)⁷ = 2⁷
@Dương Tuyết Mai

27⁵: 81³=(3³)⁵:(3⁴)³=3¹⁵:3¹²=3³=27

125³:25⁴=(5³)³:(5²)⁴=5⁹:5⁸=5

27 ^ 5 : 81 ^ 3 = 3 ^ 15 : 3 ^ 12 = 3 ^ 3 = 27
125 ^ 3 : 25 ^ 4 = 5 ^ 9 : 5 ^ 8 = 5

\(27^5:81^3=3^{15}:3^{12}=3^3\)

\(125^3:25^4=5^9:5^8=5\)