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OK, so what
do we do it the numbers are too big for a number line?
How do we
know if the answer will be positive or
negative?
Let's look at
one we did with small numbers:
Look at these
numbers without their signs:
3
and 7
Which is
bigger?
The 7.
So, the
answer will have that guy's sign... which is
positive!
Look at this
one:
Look at these and ignore the signs:
2
and 5
Who's
bigger?
The 5.
What's his
sign? Negative. So, the
answer is negative!
Let's do one
with bigger numbers:
First, will
the answer be positive or
negative?
30
and 53...
53 wins... The answer is
positive.
Now, we need
to get the number part of the answer.
Here's what
you do:
|
1 |
Ignore the signs |
|
2 |
Take the biggest number
and subtract off the smaller one |
And we leave
it positive.
Hey, don't panic!
This is easy and you'll get used to it. We just need
to do more of them!
Continued on the
next page
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