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$\textbf{Bài 1a}$
$\{[216-(36-31)^3\cdot2]-9\}\cdot1001$
$=\{216-5^3\cdot2-9\}\cdot1001$
$=(216-250-9)\cdot1001$
$=(-43)\cdot1001$
$=-43043.$
$\textbf{Bài 1b}$
$\{315-[(60-41)^2-361]\cdot4217\}+2885$
$=\{315-(19^2-361)\cdot4217\}+2885$
$=\{315-(361-361)\cdot4217\}+2885$
$=315+2885$
$=3200.$
$\textbf{a)}$
$\{[126-(36-31)^2\cdot2]-9\}\cdot1001$
$=\{126-5^2\cdot2-9\}\cdot1001$
$=(126-50-9)\cdot1001$
$=67\cdot1001$
$=67067.$
$\textbf{b)}$
$\{315-[(60-41)^2-361]\cdot4217\}+2885$
$=\{315-(19^2-361)\cdot4217\}+2885$
$=\{315-(361-361)\cdot4217\}+2885$
$=315+2885$
$=3200.$
\(4^2\cdot120-4^3\cdot17+4^2\cdot34\)
\(=4^2\left(120-4\cdot17+34\right)\)
\(=16\left(120-68+34\right)\)
\(=16\cdot86=1088\)
$\textbf{A}$
$A=[261-(36-31)^3\cdot2]-9\cdot1001$
$=[261-5^3\cdot2]-9009$
$=[261-125\cdot2]-9009$
$=(261-250)-9009$
$=11-9009$
$=-8998.$
$\textbf{B}$
$B=\{315-[(60-41)^2-361]\cdot4217\}+2885$
$=\{315-(19^2-361)\cdot4217\}+2885$
$=\{315-(361-361)\cdot4217\}+2885$
$=315-0+2885$
$=3200.$
a/ 26176
b/ 8
c/472392
d/ Ko tính dc
Thấy mình đẳng cấp ko
Cho mình 10 k nhé
$\textbf{A)}$
$A=\dfrac{4^2\cdot36+64^4}{16^4\cdot100}$
$=\dfrac{576+2^{24}}{2^{16}\cdot2^2\cdot5^2}$
$=\dfrac{576+16777216}{1638400}$
$=\dfrac{16777792}{1638400}$
$=\dfrac{262153}{25600}.$
1. a) \(45x-37=53\)
\(45x=90\)
\(x=2\)
vay \(x=2\)
b) \(\frac{x}{9}+500=600\)
\(\frac{x}{9}=100\)
\(\frac{x}{9}=\frac{900}{9}\)
\(\Rightarrow x=900\)
vay \(x=900\)
c) \(576-x=139\)
\(x=576-139\)
\(x=437\)
vay \(x=437\)
d) \(\left(48+x\right)-27=79\)
\(48+x=79+27\)
\(48+x=106\)
\(x=58\)
vay \(x=58\)
2. \(2^5.2^7.2^9=2^{5+7+9}=2^{21}\)
\(3^9.3^2.3=3^{9+2+1}=3^{12}\)
\(10^9:10^7=10^{10-7}=10^3\)
3). \(2.2.2.2.2.2=2^6\)
\(2.3.2.2.3.3.3=2^3.3^4\)
\(10.9.10.10.10.9.9=10^4.9^3\)
1 a) x= 720
b ) x=chín trăm
c)x= 437
d)x=58
bài2 a)= 221 b)312 c ) =102
bài 3 a)=26 b)=22 nhân 34 c )= 103 nhân chín mũ 3
$\textbf{1a)}$
$(1+3+5+\cdots+999)(1\cdot65\cdot101\cdot37)$
$=(500^2)(65\cdot37\cdot101)$
$=250000\cdot2405\cdot101$
$=250000\cdot242905$
$=60726250000.$
$\textbf{1b)}$
$2+4+6+\cdots+2014$
$=2(1+2+\cdots+1007)$
$=2\cdot\dfrac{1007\cdot1008}{2}$
$=1007\cdot1008$
$=1015056.$
$\textbf{a)}$
$\{[261-(36-3)\cdot3^2]-9\}\cdot1001$
$=\{261-33\cdot9-9\}\cdot1001$
$=(261-297-9)\cdot1001$
$=-45\cdot1001$
$=-45045.$
$\textbf{b)}$
$\{315-[(660-41)^2-361]\cdot4217\}+2885$
$=\{315-(619^2-19^2)\cdot4217\}+2885$
$=\{315-(619-19)(619+19)\cdot4217\}+2885$
$=\{315-600\cdot638\cdot4217\}+2885$
$=3200-1613691600$
$=-1613688400.$
$\textbf{c)}$
$[(46-32)^2-(54-42)^2]\cdot36-1872$
$=(14^2-12^2)\cdot36-1872$
$=(14-12)(14+12)\cdot36-1872$
$=2\cdot26\cdot36-1872$
$=52\cdot36-1872$
$=1872-1872$
$=0.$
$\textbf{d)}$
$42\cdot102-4^3\cdot17-4^2\cdot34$
$=42\cdot102-16\cdot(4\cdot17)-16\cdot34$
$=42\cdot102-16\cdot68-16\cdot34$
$=42\cdot102-16(68+34)$
$=42\cdot102-16\cdot102$
$=(42-16)\cdot102$
$=26\cdot102$
$=2652.$
$\textbf{e)}$
$7^3\cdot9+3^2\cdot7^4-45\cdot539$
$=3^2\cdot7^3+3^2\cdot7^4-45\cdot539$
$=9\cdot343(1+7)-45\cdot539$
$=9\cdot343\cdot8-45\cdot539$
$=72\cdot343-45\cdot539$
$=24696-24255$
$=441.$