Posted by Gio on Monday, September 16, 2013 at 8:23pm.
Write each number in expanded form using exponents.
Pls check
1, 234 (1*10^3)+(3*10^2)+(2×10^1)+4
210, 290, 450 (2*10^8)+(1*10^7)+(2*10^6)+(9*10^5)+(4*10^4)+5
7,123,456,089 (7*10^9)+(1*10^8)+(2*10^7)+(3*10^6)+(4*10^5)+(5*10^4)+(6*10^3)+(8*10^2)+(9*10^1)

Math  Kazakh, Monday, September 16, 2013 at 10:49pm
10^3=1000
1,234*1000=1,234,000
10^2=100
3*100=300
2*10=20
1,234,000+300+20+1=1,234,321
I think this is what you do if I'm reading your problem correct.
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