x + 500 = 2000 + 600
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3000 : 10 x 500 = 300 x 500 = 150000
2000 : 100 x 600 = 20 x 600 = 12000
![](https://rs.olm.vn/images/avt/0.png?1311)
999 - 333 = 666
1000 - 600 = 400
2000 - 500 = 150
Chúc bn hok tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 3000 + 5000 = 8000
5000 + 5000 = 10 000
4000 + 4000 = 8000
7000 + 2000 = 9000
6000 + 1000 = 7000
2000 + 8000 = 10 000
b) 2000 + 700 = 2700
100 + 1000 = 1100
6000 + 600 = 6600
8000 + 500 = 8500
5000 + 300 = 5300
400 + 6000 = 6400
a) 3000+5000=8000
5000+5000=10000
4000+4000=8000
7000+2000=9000
6000+1000=7000
2000+8000=10000
b) 2000+700=2700
100+1000=1100
6000+600=6600
8000+500=8500
5000+300=5300
400+6000=6400
![](https://rs.olm.vn/images/avt/0.png?1311)
2000 + 400 = 2400
9000 + 900 = 9900
300 + 4000 = 4300
600 + 5000 = 5600
7000 + 800 = 7800
2000 + 400 = 2400
9000 + 900 = 9900
300 + 4000 = 4300
600 + 5000 = 5600
7000 + 800 = 7800
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 7618 = 7000 + 600 + 10 + 8
9274 = 9000 + 200 + 70 + 4
4404 = 4000 + 400 + 4
1942 = 1000 + 900 + 40 + 2
5076 = 5000 + 70 + 6
2005 = 2000 + 5
b) 5000 + 700 + 20 + 4 = 5724
6000 + 800 + 90 + 5 = 6895
5000 + 500 + 50 + 5 = 5555
2000 + 400 = 2400
2000 + 20 = 2020
2000 + 7 = 2007
7618 = 7000 + 600 + 10 + 8
9274 = 9000 + 200 + 70 + 4
4404 = 4000 + 400 + 4
1942 = 1000 + 900 + 40 + 2
5076 = 5000 + 70 + 6
2005 = 2000 + 5
b) 5000 + 700 + 20 + 4 = 5724
6000 + 800 + 90 + 5 = 6895
5000 + 500 + 50 + 5 = 5555
2000 + 400 = 2400
2000 + 20 = 2020
2000 + 7 = 2007
![](https://rs.olm.vn/images/avt/0.png?1311)
- \(3^{1800}=3^{3.600}=27^{600}\) mà 27<37 nên \(27^{600}< 37^{600}\) hay \(3^{1800}< 37^{600}\)
- \(2^{2000}=2^{4.500}=16^{500}< 35^{500}\)
- \(3^{1791}< 3^{1800}=27^{600}< 37^{600}\)
- \(5^{285}< 5^{300}=15^{100}< 81^{100}=3^{400}< 3^{453}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
=> x + 500 = 2600
=> x = 2600 - 500
=> x = 2100
x + 500 = 2000 + 600
x + 500 = 2600
x = 2600 - 500
x = 2100