course Mth 151
Text Ass. 4.21- 70+3= (7*10^1) + (3*10^0)
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3- 3000+700+70+4= (3*10^3)+(7*10^2)+(7*10)+(4*10^0)
5- 4000+900+20+4= (4*10^3)+(9*10^2)+(2*10)+(4*10^0)
6- 50,000+2,000+100+10+8= (50*10^3)+(2*10^3)+(1*10^2)+(10*10^0)+(8*10^0)
The first term would be 5 * 10^4, not(50*10^3.
9- 42
10- 350
12- 503,568
15- 89 =(5*10^1)+(4*10^0)+(3*10^1)+(5*10^0)
18- 261= (7*10^2)+8*10^1)+(4*10^0) ·(5*10^2)+(2*10^1)+(3*10^0)
20- 815= (5*10^2)+(3*10^1)+(7*10^0) + (2*10^2)+(7*10^1)+(8*10^0)
21- 733= (4*10^1)+(3*10^1)+(4*10^0)+(2*10^2)+(9*10^1)+(9*10^0)
24- 305= (3*10^2)+(6*10^1)+(4*10^0)-(5*10^1)+(9*10^0)
25- 206= (6*10^2)+(4*10^1)+(5*10^0)- (4*10^2)+(3*10^1)+(9*10^0)
You don't show how you used expanded notation to get your answers for 18 - 25. You will need to show this on the test.
27- 256
42- 2,336
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See my notes and let me know if you have questions.