+166 The rightmost non-zero digit in (1001001)(1010101)+(989899)(1001001) -(1001)(989899)-(1010101)(1001) is $a$, and it is followed by $b$ zeroes. Find the ordered pair $(a,b)$.
I think your question is the same as this one, which has been answered:
https://web2.0calc.com/questions/help_2666
1001001×1010101 + 989899×1001001 - 1001×989899 - 1010101×1001
1011112111101 + 990889888899 - 990888899 - 1011111101
2002002000000 - 990888899 - 1011111101 =2,000,000,000,000.
If you do all the elementary math operations on the above, you should get: 2,000,000,000,000, or 2 trillion. So, the ordered pair is: a=2 and b=12, or the number of zeros after 2.
+166 Oh okay
I got it like 10 minutes after i asked for help. Thanks anyways!
