www.piclist.com/techref/index.htm?key=brain+burp+rounding

>No it doesn't because 9/9 == 1, not 0.9(recurring)

You missed the point, I was saying that 0.9(repeating) is absolutely equal

to 1. This is a basic principal of mathematics that I think was taught to me

in junior high school.

Here is the algebraic proof:

Given:

x = 0.9(repeating)

Multiply both sides by 10:

10x = 9.9(repeating)

Subtract x from both sides:

10x - x = 9.9(repeating) - x

Substitute value for x on right side:

10x - x = 9.9(repeating) - 0.9(repeating)

Simplify right side:

10x - x = 9

Simplify left side:

9x = 9

Divide both sides by 9:

x = 1

Substitute value for x on left side:

0.9(repeating) = 1

>(and 5/9 is not 0.2 recurring, but I guess that was a typo!)

Yep, a typo should have been 0.5(repeating)

>4.99999999999 (repeating) is not equal to 5.00000000 (repeating), that's

why

>we have different numbers to express it. However, 4.99999999999 (repeating)

>is nearly equal to 5

As above 4.99999999999 (repeating) is exactly equal to 5.

Paul

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In reply to: <005e01c0ea87$ded269b0$b802a8c0@bob>

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