Download Mini-lesson 1- Integer Operations

Mini-Lesson #1: Integer Operations
When you
have
opposite
signs in
addition,
you will find
the
difference of
the
numbers
and keep
the sign of
the larger
number.
Simplify without a calculator.
1) 2 + (-3)
2) -4 + (-6)
I see addition.
The numbers
have opposite
signs, so I will
find the
difference…
3-2 = 1
Now, keep the
sign of the larger
number. 3 is
bigger than 2 so
the answer will
be -1.
Addition, same
sign…Add and
keep the sign.
4 + 6 = 10
It stays
negative…
-10
3) 8 + (-3)
4) 5 + 7
Which rule
should you use?
Which rule
should you use?
5) -4 – (-7)
6) 5 – 8
7) 9 – 2
8) -3 – (-1)
This is
subtraction. I
will “add the
opposite of the
second number”.
-4 + (+7)
Now follow the
addition rules…
Add the opposite
of the second
number and
follow the rules
for addition.
Add the opposite
of the second
number and
follow the rules
for addition.
Add the opposite
of the second
number and
follow the rules
for addition.
9) 3  (-4)
Follow the rules
for multiplication.
Different signs…
multiply and the
answer is
negative.
10) -2 5
Follow the rules
for multiplication.
Different signs…
multiply and the
answer is
negative.
11) 6 7
Follow the rules
for multiplication.
Same signs…
multiply and the
answer is
positive.
12) -3  (-2)
Follow the rules
for multiplication.
Same signs…
multiply and the
answer is
positive.
3
-12
13)
12
6
Follow the rules
for division.
Same signs…
divide and the
answer is
positive.
14)
−20
4
Follow the rules
for division.
Different signs…
divide and the
answer is
negative.
15)
−36
−6
Follow the rules
for division.
Same signs…
divide and the
answer is
positive.
10
16) −5
Follow the rules
for division.
Different signs…
divide and the
answer is
negative.
Integer Operations
Name: __________________________________________
1) 3 + (-4)
2) -5 + 7
3) -2 + (-1)
4) 5 + 3
5) -3 - 5
6) -6 – (-4)
7) 10 – (-3)
8) 14 – 6
9) -4 – (-3)
10) 1 + (-6)
11) 9 – (-1)
12) -4 + 8
13) (3)(-3)
14) (-4)(5)
15) (2)(5)
16) (-6)(-7)
17)
12
−4
18)
−25
−5
19)
−36
6
20)
−8
−4