Welcome to GED microlearning, my name is
Dr. MCR and in this episode I'm going to
teach you the basics of number lines
number lines which come up in the basic
arithmetic section of your GED math test.
The first step in reading a number line
is to locate the starting point which is
usually 0. Finding the 0 on the number
line is useful to orient yourself
because once you find the 0 you know
that every number to the right will be a
positive number and every number to the
left will be a negative number. When we
look at a number line numbers increase
in size from left to right so here you
can see that the number 1 is smaller
than 4 so as we move to the right it
becomes larger. The same thing applies on
the other side, so minus 4 would be
smaller than minus 1. My second
suggestion is to find the intervals on
your number line. So the first step, find
your zero that's your starting point . And
if you look towards the right they give
you a 10, if you look towards the left
they give you a minus 15. They also give
you two letters on the number line A and
D, and they want you to find out the
distance or the interval between these
two letters so what you have to do now
is to try to figure out what each of the
points or the little lines on the number
line is worth . In this case is pretty
straight forward because it looks like
every single segment is 5, so we would go
from 0 to 5 , from 5 to 10, 10 to 15 on
your right side and the same on the left
side. Now we're going to do five basic
problems together. I suggest that you
follow these guidelines, so first of all
find your zero. Then find your intervals,
and then answer the question that
they're asking. In this first problem
they're asking you which distance is the
greatest, so if we start at zero and then
the first question asks from minus 2 to
1 so it we would have plus 1 plus 2 plus
3 so the interval is 3. The second one
from -4 to -3 would be just one. The third
example, where they're asking you - four
to zero that would be one plus two plus
another one excuse me
plus one again and another one so the
interval would be four. And finally they
ask you the interval between 1 and 3 and
that would be one and another one so it
would be two. So your answer would be C.
Here they're asking you the closest
location of pi minus 3 so you first find
0, then you remind yourself that pi is
equal to 3.14 and subtract 3 from
that which gives you 0 .14 and
then when you look at your number line
0.14 would fall within the first
interval so the correct answer would be
A.  In this example they're asking you to
find the product of 4 and pi so remind
yourself of the value for pi then
multiply that by 4, it gives you 12.56
and that would fall between 12 and
13 on your number line, so your answer
here would be D and notice also that in
this case they didn't
didn't show you a 0 on the number line.
Okay here they're asking you for the
location of 3/4 so you would go ahead
and divide 4 by 3 that gives you 0.75. If
you had to make an educated guess, just
think if they asked you for the location
of 2/4 that would equal to 1/2 or 0.5, so
your answer would have to be higher
that's why it would be D here. They're
asking you what's the point depicted on
the number line so you would find your 0,
it's a value to the left of 0 so it's
going to be negative. And that leaves you
two choices B or D because it's between
minus 1 and 0 it would be minus 1/2.
All right , so those were five basic
examples of number line problems. So
remember, find the zero on your number
line, everything to the right will be
positive everything to the left will be
negative. And then the next step is to
find the intervals or each segment
within your number line.
All right GED rockstars, I hope you found
that useful. If you did, and you want more
videos like this please make sure to
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notification bell. As always folks, stay
positive and stay strong! I know
sometimes it seems like an uphill battle,
but you WILL succeed. Have a great day
and thanks for watching!
