a) ([ 10 - 2.30 . 5 ] +2.6 ) :2 + (4.5) 2
b)536 .27 - 9 (825 +219) :18 +153 : 152 42 .3
1, Tính
a ) 536 . 27 - ( 825 + 219 ) : 18 + 153: 152 - 42. 3
b) 120 - [ 5871 : 103 + 32. 2 - ( 90 + 110 + 6 ) : 23 ]
c) - /-5/ + ( - 19 ) + ( - 18 ) + / 11 - 4 / - 57
bn có thể dùng CACULARTOR
a) \(536.27-\left(825+219\right):18+15^3:15^2-4^2.3\)
\(=526.27-1044:18+15-16.3=14202-58+15-48\)
\(=\left(14202+15\right)-\left(58+48\right)=14217-106=14111\)
b) \(120-\left[5871:103+3^2.2-\left(9^0+1^{10}+6\right):2^3\right]\)
\(=120-\left[57+9.2-\left(1+1+6\right):2^3\right]\)
\(=120-\left[57+18-8:8\right]=120-74=46\)
c) \(-|-5|+\left(-19\right)+\left(-18\right)+|11-4|-57\)
\(=\left(-5\right)-19-18+7-57=\left(-42\right)+\left(-50\right)=-92\)
Tính hợp lí , nếu có thể
536 . 27 - ( 825 + 219 ) : 18 + 153 : 152 - 42 . 3
21 . 72 - 11 . 72 + 49 . 125 . 16
Tính
a, 536.27-(825 + 219 ) : 18 + 153 . 152 - 42
b, 120 - [ 5871 : 103 + 32 . 2 - ( 90 + 110 - 6 ). 23]
c, - | -5 | + ( - 19 ) + (+ 18 ) + | 11 - 4 | - 57
Thực hiện phép tính
\(\dfrac{27^3.11+9^5.5}{3^9.2^4}\)
\(\dfrac{5^8+2^2.25^4+2^3.125^3-15^4.5^4}{4^2.625^2}\)
\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
Giúp mik
a) \(\dfrac{27^3\cdot11+9^5\cdot5}{3^9\cdot2^4}\)
\(=\dfrac{3^9\cdot11+3^{10}\cdot5}{3^9\cdot2^4}\)
\(=\dfrac{3^9\cdot\left(11+3\cdot5\right)}{3^9\cdot2^4}\)
\(=\dfrac{11+15}{16}\)
\(=\dfrac{26}{16}\)
\(=\dfrac{13}{8}\)
b) \(\dfrac{5^8+2^2\cdot25^4+2^3\cdot125^3-15^4\cdot5^4}{4^2\cdot625^2}\)
\(=\dfrac{5^8+2^2\cdot5^8+2^3\cdot5^9-3^4\cdot5^4\cdot5^4}{2^4\cdot5^8}\)
\(=\dfrac{5^8\cdot\left(1+2^2+2^3\cdot5-3^4\right)}{5^8\cdot2^4}\)
\(=\dfrac{1+4+40-81}{16}\)
\(=\dfrac{-36}{16}\)
\(=\dfrac{-9}{4}\)
c) \(\dfrac{4^5\cdot9^4-2\cdot6^9}{2^{10}\cdot3^8+6^8\cdot20}\)
\(=\dfrac{2^{10}\cdot3^8-2\cdot2^9\cdot3^9}{2^{10}\cdot3^8+2^{10}\cdot3^8\cdot5}\)
\(=\dfrac{2^{10}\cdot3^8\cdot\left(1-3\right)}{2^{10}\cdot3^8\cdot\left(1+5\right)}\)
\(=\dfrac{-2}{6}\)
\(=-\dfrac{1}{3}\)
536x27-(825+219):18+153:152-42x3
536x27-(825+219):18+153:152-42x3
=536x27-(825+219):18+151-16x3
=536x27-1044:18+15-16x3
=14472-58+15-48
=14414+15-48
=14429-48
=14381
BÀI 1
a, (5 mũ 2 + 1) -9.3 b,80 -(4.5 mũ 2 - 3.2 mũ 3)
c,[(-18) +( -7)] -15 d,(-219)-(-229) + 12.5
a) (52 + 1) - 9.3
= 26 - 9.3
= 16.7
b) 80 - (4.52 - 3.23)
= 80 - (20.25 - 32.768)
= 80 - (-12.518)
= 92.518
c)[(-18) + (-7)] -15
= -25 - 15
= -40
d) (-219) - (-229) + 12.5
= 10 + 12.5
= 22.5
Tick cho mik nhé
tìm x biết :
a) (-2)x=87trên 83
b) 3x= 98trên 273.812
c)3.5x+2+4.5x-3=19.510
d) 11.6x-1+2.6x+1= 11.611+2.613
g) 33x+ 27x+9-33=330
h) 2.3x=10.312+8.274
Tính giá trị của biểu thức
a)42+69+158
b) 2^4.5-27:3^2
c)125-75:5+10
d)(8-5)^3+7^8:7^6+1^2014
tìm n thuộc N biết :
a)3.5^n+2+4.5^n-3=19.5^10
b)11.6^x-1+2.6^x-1=11.6^11+2.6^13
c)\(\frac{2^{4-x}}{16^5}=32^6\)