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a﴿ 213 = 200 + 10 + 3 = 2.100 + 10 + 3 = 2.10^ 2 + 10^ 1 + 3
b﴿ 421 = 400 + 20 + 1 = 4.100 + 2.10 + 1 = 4.10^ 2+ 2.10^ 1 + 1
c﴿ 2009 = 2000 + 9 = 2 . 1000 + 9 = 2.10 ^3 + 9
d﴿ abc = a.100 + b.10 + c = a.10^ 2 + b.10^ 1 + c
e﴿ abcde = a.10000 + b.1000 + c.100 + d.10 + e = a.10^ 4+ b.10^ 3+ c.10 ^2+ d.10^ 1 + e
a﴿ 213 = 200 + 10 + 3 = 2.100 + 10 + 3 = 2.10 2 + 10 1 + 3
b﴿ 421 = 400 + 20 + 1 = 4.100 + 2.10 + 1 = 4.10 2+ 2.10 1 + 1
c﴿ 2009 = 2000 + 9 = 2 . 1000 + 9 = 2.10 3 + 9
d﴿ abc = a.100 + b.10 + c = a.10 2 + b.10 1 + c
e﴿ abcde = a.10000 + b.1000 + c.100 + d.10 + e = a.10 4+ b.10 3+ c.10 2+ d.10 1 + e
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 213 = 200 + 10 + 3 = 2.100 + 10 + 3 = 2.102 + 101 + 3
b) 421 = 400 + 20 + 1 = 4.100 + 2.10 + 1 = 4.102 + 2.101 + 1
c) 2009 = 2000 + 9 = 2 . 1000 + 9 = 2.103 + 9
d) abc = a.100 + b.10 + c = a.102 + b.101 + c
e) abcde = a.10000 + b.1000 + c.100 + d.10 + e = a.104 + b.103 + c.102 + d.101 + e
![](https://rs.olm.vn/images/avt/0.png?1311)
\(213=200+10+3=2\cdot100+10+3=2\cdot10^2+10^1+3\)
\(421=400+20+1=4\cdot100+2\cdot10+1=4\cdot10^2+2\cdot10^1+1\)
\(2009=2000+9=2\cdot1000+9=2\cdot10^3+9\)
\(abc=a\cdot100+b\cdot10+c=a\cdot10^2+b\cdot10^1+c\)
\(abcde=a\cdot10000+b\cdot1000+c\cdot100+d\cdot10+e=a\cdot10^4+b\cdot10^3+c\cdot10^2+d\cdot10^1+e\)
a﴿ 213 = 200 + 10 + 3 = 2.100 + 10 + 3 = 2.10 2 + 10 1 + 3
b﴿ 421 = 400 + 20 + 1 = 4.100 + 2.10 + 1 = 4.10 2+ 2.10 1 + 1
c﴿ 2009 = 2000 + 9 = 2 . 1000 + 9 = 2.10 3 + 9
d﴿ abc = a.100 + b.10 + c = a.10 2 + b.10 1 + c
e﴿ abcde = a.10000 + b.1000 + c.100 + d.10 + e = a.10 4+ b.10 3+ c.10 2+ d.10 1 + e
![](https://rs.olm.vn/images/avt/0.png?1311)
213 = 2.102 + 1.101 + 3.100
421 = 4.102 + 2.101 + 1.100
2009 = 2.103 + 0.102 + 0.101 + 9.100
abc = a.102 + b.101 + c.100
abcde = a.104 + b.103 + c.102 + d.101 + e.100
\(213=2×10^2+1×10^1+3×10^0\)
\(421=4×10^2+2×10^1+1×10^0\)
\(2009=2×10^3+0×10^2+0×10^1+9×10^0\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(213=\)\(2.10^2\) \(+1.10+3.10^0\)
\(421=4.10^2+2.10+1.10^0\)
\(1256=1.10^3+2.10^2+1.10^0\)
\(2006=2.10^3+0.10^2+0.10+6.10^0\)
abc = a . 10 ^2 + b .10 + c .10 ^ 0
abcde = a.10 ^ 4 + b.10^3 + c.10^ 2+ d .10 + e . 10 ^ 0
k cho mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
213=102+102+101+100
421=4*102+2*101+100
2009=2*103+9*100
abc=a*102+b*101+c*100
abcde=a*104+b*103+c*102+d*101+e*100
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 213 = 2.10^2 + 1.10 + 3.10^0
b) 421 = 4.10^2 + 2.10 + 1.10^0
c) 1256 = 1.10^3 + 2.10^2 + 5.10 + 6.10^0
d) 2006 = 2.10^3 + 0.10^2 + 0.10 + 6.10^0
e) abc = a.10^2 + b.10 + c. 10^0
g) abcde = a.10^4 + b.10^3 + c.10^2 + d.10 + e.10^0
a) 213= 2.100+1.10+3=2.102+1.10+3.100 b) 421=4.100+2.10+1=4.102+2.10+1.100
c)1256=1.1000+2.100+5.10+6=1.103+2.102+5.10+6.100 d) 2006=2.1000+0.100+0.10+6=2.103+0.102+0.10+6.100
câu e bạn làm giống câu a còn câu g bạn làm giống câu c là được
nhớ k mk nha
213= 10 mũ 2+10 mũ 2+10 mũ 1 cộng 10 mũ 0 cộng 10 mũ 0 cộng 10 mũ 0
421=10 mũ 2+10 mũ 2+10 mũ 2+10 mũ 2 +10 mũ 1 + 10 mũ 1 +10 mũ 0
2009=10 mũ 3 + 10 mũ 3 + 10 mũ 0+10 mũ 0 + 10 mũ 0 +10 mũ 0 +10 mũ 0 +10 mũ 0 +10 mũ 0 +10 mũ 0+10 mũ 0 +10 mũ 0
abc= a.10 mũ 2+b.10 +c.10 mũ 0
abcde = 10 mũ 4.a +10 mũ 3.b +10 mũ 2.c +10.d +10 mũ 0.e
\(213=10^2+10^2+10^1+10^0+10^0+10^0\)
\(421=10^2+10^2+10^2+10^2+10^1+10^1+10^0\)
\(2009=10^3+10^3+10^0+10^0+10^0+10^0+10^0+10^0+10^0+10^0+10^0\)
\(abc=10^2\times a+10^1\times b+10^0\times c\)
\(abcde=10^4\times a+10^3\times b+10^2\times c+10^1\times d+10^0\times e\)