SOLUTION: MAT 145: Topics In Contemporary Math Operations in Bases Find each of the following. Be careful which base the work is done in! Someone please help me wit

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Question 1192646: MAT 145: Topics In Contemporary Math
Operations in Bases
Find each of the following. Be careful which base the work is done in!

Someone please help me with these for some reason I don't understand it and figure it out.
3) 143(5) + 432(5)
4) 3145(7) + 216(7)
5) 4344(9) + 2313(9)
6) 143(5) − 34(5)
7) 9327(11) − 7318(11)
8) 6323(7) − 415(7)
9) 11100100(2) − 11111(2)
10) 111001004(4) − 12321(4)

Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website!
10) 111001004(4) − 12321(4)
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A 4 in base 4 is not allowed, only 0, 1, 2 & 3.

Answer by ikleyn(52803) (Show Source):
You can put this solution on YOUR website!
.

Regarding addition in other bases than 10, see and learn from this video-lesson

https://www.youtube.com/watch?v=U-19aiF2pbg

For textual explanations, see and learn from this web-page

https://online.math.uh.edu/Math2303-unpaid/ch1/s15/2303-Section-15.pdf