222: 2+2+2=6

575: 5+7+5=17

55: 5+5=10

222=200+20+2

575=500+70+5

55=50+5

a) \(23197=2\cdot10^4+3\cdot10^3+10^2+9\cdot10^1+7\)

b) \(203184=2\cdot10^5+3\cdot10^3+10^2+8\cdot10^1+4\)

$a)$

$17120=10000+7.1000+100+2.10$

$={10}^4+7.{10}^3+{10}^2+2.10$

$b)$

$917111=9.100000+10000+7.1000+100+10+1$

$=9.{10}^5+{10}^4+7.{10}^3+{10}^2+10+1$

$c)$ với a khác 0

$\overline{abc}=a.100+b.10+c$

$=a{.10}^2+b.10+c$

$a)$

$17120=10000+7.1000+100+2.10$

$={10}^4+7.{10}^3+{10}^2+2.10$

$b)$

$917111=9.100000+10000+7.1000+100+10+1$

$=9.{10}^5+{10}^4+7.{10}^3+{10}^2+10+1$

$c)$ với a khác 0

$\overline{abc}=a.100+b.10+c$

$=a{.10}^2+b.10+c$

a, 17120 = 1.10⁴ + 7.10³ + 1.10² + 2.10¹ + 0

b, 917111 = 9.10⁵ + 1.10⁴ + 7.10³ + 1.10² + 1.10¹ + 1

c, \(\overline{abc}\) = \(a.10^2\) + \(b\).10 + c

\(\hept{215=2\times10^2+10+5\times10^0}\)

\(902=9\times10^2+2\times10^0\)

\(2020=2\times10^3+2\times10\)

\(883001=8\times10^5+8\times10^4+3\times10^3+10^0\)

a) 215=2.10^2+1.10+5

b) 902=9.10^2+2

c) 2020=2.10^3+2.10

d) 883001=8.10^5+8.10^4+3.10^3+1

\(a)\)\(215=2.10^2+1.10+5\)

\(b)\)\(902=9.10^2+2\)

\(c)\)\(2020=2.10^3+2.10\)

\(d)\)\(883001=8.10^5+8.10^4+3.10^3+1\)

CẢM ƠN MỌI NGƯỜI

\(2023=2000+20+3\)

\(acb=100a+10c+b\)

\(abc1=1000a+100b+10c+1\)

\(215=2\cdot10^2+1\cdot10+5\cdot10^0\)

\(902=9\cdot10^2+2\cdot10^0\)

\(2020=2\cdot10^3+2\cdot10\)

\(883011=8\cdot10^5+8\cdot10^4+3\cdot10^3+10+1\cdot10^0\)

\(215 = 2. 10^2 + 1. 10^1 + 5. 10^0\)

\(902 = 9.10^2 + 0.10^1+ 2 . 10^0\)

\(2 020 = 2.10^3+0.10^2+2.10^1+0. 10^0\)

\(883 001 = 8.10^5+8.10^4+3.10^3+0.10^2+0.10^1+1. 10^0\)