a:\(\frac{2^3.2^5.4^2}{2^9}\)
Tính
5⁶ : 5³ +2³ :2²
3333 : 3 + 225 : 15
15 . 2³ + 4.3² -5.7
5.4² - 18 : 3²
6² : 4.3 + 2.5³
80 - ( 4.5² - 3.2³)
Lời giải:
a.
$=5^{6-3}+2^{3-2}=5^3+2^1=125+2=127$
b.
$=3333:3+225:15=1111+15=1126$
c.
$=15.2^3+4.3^2-5.7=15.8+4.9-35=120+36-35=120+1=121$
d.
$=5.4^2-18:3^2=5.16-18:9=80-2=78$
e.
$=6^2:4.3+2.5^3=36:4.3+2.125$
$=9.3+250=27+250=277$
f.
$=80-(4.25-3.8)=80-(100-24)=80-100+24=-20+24=4$
Tính
5⁶ : 5³ +2³ :2²
3333 : 3 + 225 : 15
15 . 2³ + 4.3² -5.7
5.4² - 18 : 3²
6² : 4.3 + 2.5³
80 - ( 4.5² - 3.2³)
5⁶ : 5³ +2³ :2²
3333 : 3 + 225 :15
15.2³ + 4.3² - 5.7
5.4² - 18 :3²
6² : 4.3 +2.5²
80 - ( 4.5² -3.2³)
Tính giá trị biểu thức:
A=3.22+4.32+5.42+...+2017.20162
B=13+23+33+...+10003
C= 1.2+2.22+3.23+....+100.2100
a, \(\frac{45^3.20^4.18^2}{180^5}\)
b, \(\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
c, \(\left(125^3.7^5-175^5:5\right):2016^{2017}\)
d, \(16.64.8^2:\left(4^3.2^5.16\right)\)
e,\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^9.27^6}\)
Đề bài: Tính bằng cách hợp lí.
\(\frac{45^3.20^4.18^2}{180^5}=\frac{\left(3^2.5\right)^3.\left(2^2x5\right)^4.\left(2x3^2\right)^2}{\left(2^2.3^2.5\right)^5}\)
\(=\frac{3^6.5^3.2^8.5^4.2^2.3^4}{2^{10}.3^{10}.5^5}\)\(=\frac{3^{10}.5^7.2^{10}}{2^{10}.3^{10}.5^5}=\frac{5^7}{5^5}=5^2\)
Tính \(A=\frac{5.6^{18}.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^4}{5.4^{14}.3^{18}-7.2^{29}.9^9}\)
Tính
60/{[(12-3).2]+2}
80-[130-(12-4)2 ]
39.213.87.39.300.29
5.42-18/32+3.24
\(\frac{60}{\left\{\left[\left(12-3\right).2\right]+2\right\}}=\frac{60}{20}=3\)
Giúp vs mọi người ơi!
Tính:
a) \(\frac{2^{16}+2^8}{2^{13}+2^5}\)
b) \(\frac{5.4^{15}-9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)
Tính nhanh ( nếu có thể )
5.42 - 18 : 32 . 22+2.115
80- (4.52-3.23)
5.42 - 18 : 32 . 22+2.115 = 5 .24 - 2.32:32.22+2
= 5 . 24 - 23 + 2
= 5 . 10 = 50
80- (4.52-3.23) = 24 . 5 - 22 .52 + 3 .23
= 22 ( 22 .5-5+ 3.2)
= 4 . 21 = 84