245 -175 +246 -71
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PL
3
Y
4 tháng 11 2017
1724 * 85 +1724 * 25 - 1724 * 10
= 1724 * ( 85+25-10)
= 1724 * 90
= 155160
PT
6
BT
15 tháng 4 2017
Ta có:
+/ 31245 < 32245 = (25)245=25x245 = 21225 => 31245 < 21225
+/ 131175 > 128175 = (27)175 = 27x175 = 21225 => 131175 > 21225
=> 131175 > 31245
PV
1
21 tháng 12 2023
a: \(\left[\left(-59\right)+71\right]-\left[\left(-83\right)-\left(-95\right)\right]\)
\(=\left[71-59\right]-\left[-83+95\right]\)
=12-12
=0
b: \(\left(435-167-89\right)-\left(435-89\right)\)
\(=435-167-89-435+89\)
\(=\left(435-435\right)+\left(89-89\right)-167\)
=0+0-167
=-167
c: \(\left(-624\right)-\left[\left(376+245\right)-45\right]\)
\(=\left(-624\right)-\left[376+245-45\right]\)
\(=\left(-624\right)-376-200\)
=-1000-200
=-1200
DQ
0
TV
0
NN
3
D
1
18 tháng 11 2018
Dễ thấy \(175=35\cdot5\)và \(245=35\cdot7\)nên có:
\(131^{175}=\left(131^5\right)^{35}\)và \(31^{245}=\left(31^7\right)^{35}\)
Để so sánh \(131^{175}\) và \(31^{245}\)ta cần so sánh \(131^5\)và \(31^7\)
Ta có \(131^5>124^5=4^5\cdot31^5\)và \(31^7=31^5\cdot31^2\)
Ta cần so sánh \(4^5\)và \(31^2\)
Nhận thấy \(4^5=1024>961=31^2\)
Do đó\(131^5>31^7\) suy ra \(131^{175}>31^{245}\)
Chúc bạn học tốt!
14 tháng 6 2017
Rewrite each of the following sentences, using the word in the capital
1- If you do have any free time, could you give me a ring? SHOULD
=>Should you not have any free time,could you give me a ring?
2- We won’t go away if the weather is bad. UNLESS
=>Unless the weather is bad,we will go away.
3- I didn’t have the money, so I didn’t buy a new suit. WOULD
=>If I had had the money,I would have bought a new suit.
4- If you hurry up, you won’t be late. GOING
=>If you don't hurry up,you are going to be late(caau nayf laayf nhas)
5- If they offered you the job, would you accept? WERE
=>Were they to offer you the job, would you accept? .
6- If you are in London by any chance, come and see me. HAPPEN
=>Should you happen to be in London, come and see me.
7- Without you, I would have given up years ago. BEEN
=>If it hadn't been for you, I would have given up years ago.
8- Please take a seat, and I’ll inquire for you. WILL
=>If you take a seat, I’ll inquire for you.
9- Don’t take this job if you don’t really want it. UNLESS
=>Unless you really want this job,don't take it.
10- I wasn’t tall enough to reach the shelf. TALLER
=>If I were taller,I could reach the self.
11- If the ship sank, what would you do? WERE
=>Were the ship to sink,what would you do
12- If you should notice what’s on at the cinema, let me know. HAPPEN
=>Should you happen to notice what’s on at the cinema, let me know. .
13- If you hadn’t encouraged me, I would have given up. BUT
=>But for you encouragement, I would have given up..
14- I don’t have any money, so I can’t lend you any. IF
=>If I had money.I could lend you any.
15- But for Helen, the play would be a flop. WERE
=>Were it not to be Helen, the play would be a flop.