# inequalities

• Nov 13th 2011, 11:09 AM
David Green
inequalities
I am quite confident that I understand the signs of inequalities, which I understand as;

> greater than
< less than

The part I am not quite sure about is if when reading inequalities you are permitted to read then both ways, i.e. from the left and from the right?

So in this example;

4 < -5

- 5 is less than 4, and

4 is greater than - 5

in this example would it be right to read it from right to left?

Thanks

David
• Nov 13th 2011, 11:12 AM
Siron
Re: inequalities
You can read 4<-5 in two ways, 4 is less than -5 or -5 is greater then 4, which is offcourse not true.

You can read (in general) a<b in two ways:
a is less than b or b is greater than a

Thus, a<b and b>a are the same.
I hope this is clear.
• Nov 13th 2011, 11:15 AM
veileen
Re: inequalities
Yes, you can read them both ways, but do that correct.

4 > -5 means "4 is greater than - 5" (from left to right) and "- 5 is less than 4" (form right to left)

-2 < 3 means "-2 is less than 3" (from left to right) and "3 is greater than -2" (from right to left)