(-5)^2×20^4/8^2×(-125)
4 x 125 x 25 x 8
2 x 8 x 50 x 25 x 125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
tinh nhanh
4 x 125 x 25 x 8
2 x 8 x 50 x25 x125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
4 × 125 × 25 × 8
= (4 × 25) × (125 × 8)
= 100 × 1000
= 100 000
2 × 8 × 50 × 25 × 125
= (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 125
= 12 500 000
2 × 3 × 4 × 5 × 50 × 25
= (2 × 50) × (4 × 25) × (3 × 5)
= 100 × 100 × 15
= 150 000
25 × 20 × 125 × 8 - 8 × 20 × 5 × 125
= 8 × 125 × 20 × (25 - 5)
= 1000 × 20 × 20
= 400 000
- (25 x 4) x (125 x8)=100 x 1000 =100000
- (50 x 2) x (8 x 125) x 25=100 x 1000 x 25 =2500000
- (2 x 50 ) x (4 x 25) x (3 x5)=100 x 100 x 15=150000
- 25 x 20 x125 x 8 - 5
= (20 x 5) x (125 x 8) -25=100 x 1000 -5 =100000 - 5 =99995
4 *125*25*8
=4*25*125*8
=100*1000
=100000
2*8*50*25*125
=2*50*8*125*25
=100*1000*25
=2500000
2*3*4*5*50*25
=2*50*4*25*3*5
=100*100*15
=150000
25*20*125*8-8*20*5*125
=25*4*5*125*8-8*125*20*5
=100*1000*5-1000*100
=500000-100000
=400000
=
tính : 8^2 x 125 x 9^2 - 32 x 5^3 x 81 phần 20^3 x 3^4 - 6^8 x 5^4
\(\dfrac{8^2.125.9^2-32.5^3.81}{20^3.3^4-6^8.5^4}\)
\(=\dfrac{2^6.5^3.3^4-2^5.5^3.3^4}{4^3.5^3.3^4-2^8.3^8.5^4}\)
\(=\dfrac{2^6.5^3.3^4-2^5.5^3.3^4}{2^6.5^3.3^4-2^8.3^8.5^4}\)
\(=\dfrac{2^5.5^3.3^4\left(2-1\right)}{2^6.5^3.3^4\left(1-2^2.3^4.5\right)}\)
\(=\dfrac{2^5.5^3.3^4.1}{2^6.5^3.3^4\left(1-810\right)}\)
\(=\dfrac{1}{2.\left(-809\right)}\)
\(=-\dfrac{1}{1618}\)
bài 1:
4 x 125 x 25 x 8 = 2 x 8 x 50 x 25 x 125 =
2 x 3 x 4 x 5 x 50 x 25 = 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125 =
\(4.125.25.8\)
\(=\left(4.25\right).\left(125.8\right)\)
\(=100.1000\)
\(=100000\)
\(2.3.4.5.50.25\)
\(=\left(2.50\right).\left(4.25\right).\left(3.4.5\right)\)
\(=100.100.60\)
\(=10000.60\)
\(=600000\)
\(2.8.50.25.125\)
\(=\left(2.50\right).\left(8.125\right).25\)
\(=100.1000.25\)
\(=100000.25\)
\(=2500000\)
27(-3/2)^-5 × (-2/5)^-4 ÷ (2/125)
8^5×(-5)^8 + (-2)^5× 10^9/ 2^16× 5^7 +20^8
Rút gọn các biểu thức
Thực hiện phép tính: a) 12.(-5).(-2).(-6);
b) (-4).7.11.(-2)
c) 25.(-5).4.(-20).
d) 125.(-3).(-8).(-10)
a) 12 . ( - 5 ) . ( - 2 ) . ( - 6 )
= - 60 . 12
= - 720
b) ( - 4 ) . 7 . 11 . ( - 2 )
= - 28 . ( - 22 )
= 616
c) 25 . ( - 5 ) . 4 ( - 20 )
= - 125 . ( - 80 )
= 10 000
d) 125 . ( - 3 ) . ( - 8 ) . ( - 10 )
= - 375 . 80
= - 30 000
Thực hiện phép tính: a) 12.(-5).(-2).(-6); b) (-4).7.11.(-2) c) 25.(-5).4.(-20). d) 125.(-3).(-8).(-10)
B1: tính a)(-4).3.(-25) b)(-8).5.(+125).2 Giúp mình với nhé mn c)25.(-5).(-4).20
a. =[(-4)(-25)].3=100.3=300
b. =[(-8).125][5.2]=-1000.10=-10000
c. =[25.(-4)][(-5).20]=-100(-100)=10000
bủh
1.Viết các tích sau dưới dạng lũy thừa
a) 4^8 . 2^20 ; 9^12 . 27^5 . 81^4 ; 64^3 . 4^5 . 16^2
b) 25^20 . 125^4 ; x^7 . x^4 . x^3 ; 3^6 . 4^6
c) 8^4 . 2^3 . 16^2 ; 2^3 . 2^2 . 8^3 ; y . y^7
2.Tính giá trị lũy thừa sau
a) 2^2 ; 2^3 ; 2^4 ; 2^5 ; 2^6 ; 2^7 ; 2^8 ; 2^9 ; 2^10
b) 3^2 ; 3^3 ; 3^4 ; 3^5
c) 4^2 ; 4^3 ; 4^4
d) 5^2 ; 5^3 ; 5^4
3.Viết các thương sau dưới dạng lũy thừa
a) 4^9 : 4^4 ; 17^8 : 17^5 ; 2^10 : 8^2 ; 18^10 : 3^10 ; 27^5 : 81^3
b)10^6 : 100 ; 5^9 : 25^3 ; 4^10 : 64^3 ; 2^25 : 32^4 ; 18^4 : 9^4
1) a) 4⁸.2²⁰ = (2²)⁸.2²⁰
= 2¹⁶.2²⁰ = 2³⁶
-----------
9¹².27⁵.81³ = (3²)¹².(3³)⁵.(3⁴)⁴
= 3²⁴.3¹⁵.3¹⁶ = 3⁵⁵
--------
64³.4⁵.16² = (4³)³.4⁵.(4²)²
= 4⁹.4⁵.4⁴ = 4¹⁸
b) 25²⁰.125⁴ = (5²)²⁰.(5³)⁴
= 5⁴⁰.5¹² = 5⁵²
--------
x⁷.x³.x⁴ = x¹⁴
--------
3⁶.4⁶ = (3.4)⁶ = 12⁶
2) a) 2² = 4
2³ = 8
2⁴ = 16
2⁵ = 32
2⁶ = 64
2⁷ = 128
2⁸ = 256
2⁹ = 512
2¹⁰ = 1024
b) 3² = 9
3³ = 27
3⁴ = 81
3⁵ = 243
c) 4² = 16
4³ = 64
4⁴ = 256
d) 5² = 25
5³ = 125
5⁴ = 625
3)
a) 4⁹ : 4⁴ = 4⁵
17⁸ : 17⁵ = 17³
2¹⁰ : 8² = 2¹⁰ : (2³)² = 2¹⁰ : 2⁶ = 2⁴
18¹⁰ : 3¹⁰ = (18 : 3)¹⁰ = 6¹⁰
27⁵ : 81³ = (3³)⁵ : (3⁴)³ = 3¹⁵ : 3¹² = 3³
b) 10⁶ : 100 = 10⁶ : 10² = 10⁴
5⁹ : 25³ = 5⁹ : (5²)³ = 5⁹ : 5⁶ = 5³
4¹⁰ : 64³ = 4¹⁰ : (4³)³ = 4¹⁰ : 4⁹ = 4
2²⁵ : 32⁴ = 2²⁵ : (2⁵)⁴ = 2²⁵ : 2²⁰ = 2⁵
18⁴ : 9⁴ = (18 : 9)⁴ = 2⁴