here is a teaching tutorial for adding
and subtracting integers
kids will learn integer addition and
subtraction rules
in will solve simple problems students
may participate as they view the video
as part of your lesson plan
and answer key is at the end and the
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begin
with the rules for adding integers -13
plus negative 8
do the numbers have the same sign yes
find the sum 13
plus 8 this equals
21 keep the same sign
the sign was negative the answer is -21
-19 plus 12
do the numbers have different signs yes
find the difference 19 -12
this equals seven
keep the sign the larger number
19 is larger it is negative
so the answer is
-7 now for a subtracting integers rule
-15 -22
change the subtraction problem into
addition
the first number stays the same
switch the sign the second number
notice this minus sign is not the sign
it is the operation of subtraction the 22
doesn't have any sign in front of it
so it is positive the opposite a
positive is negative
the new problem is -15 plus
-22 now use the rules in addition
since you are now adding the same sign which is
negative
the answer is -37 when subtracting
integers
subtract actually means add the opposite
let's review
who remembers number one
if it is in addition problem with the
same signs what do you do
find the sum and keep the sign of  the
larger number
a little trick to remember this rule is
to notice the s
same begins with s and so does the word
sum
number two if it is an addition problem
with different signs
what do you do find the difference
and keep the sign of the larger number
another little trick
may be found in this rule different
begins with D and so does the word
difference
so same signs find the sum
different signs find the difference
what about subtraction
number three what do you do
first on a subtraction problem change it
to an addition problem
number four what do you do to the next
number after you changed the operation
switch the sign of the second number
number five what is the last step
when subtracting integers solve using
the rules of addition
are you ready for some integer problems
you can do it number one
negative 32 plus -13
number two -25
plus 14 watch the sign
number three 46
minus -14 don't forget to switch
number four -38
minus 11
are you ready for the integer
problems answer key if not please
pause the video now
number one
is -45 number two
is -11 number three
is sixty number four is -49
you completed the integer tutorial
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