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:
Time addition program
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xpi0t0s
Mentor
18Jan2009,17:53
1.50
1.50
1.50
-----
4.50
-----
Now add 0.40
But how do you know that you have to add .40? Dividing by 100 doesn't simplify the problem, which is essentially all you've done.
2.00
1.25
1.25
===
4.50
So do we add .40 or not? Why?