Download Multiplying Integers

Multiplying Integers
Warm Up
1. 14(-2)
4. -15(9)
2. (-2)(50)
5. -3(-100)
3. -18(0)
6. -6(32)
Multiplying Integers
• Multiply the absolute values of the integers.
• If both integers have the same sign, the
product is positive.
• If they have different signs, the product is
negative.
Henry multiplied two negative numbers.
Franklin multiplied a negative and a positive
number. Franklin claims his product is greater
than Henry’s because both Henry’s numbers are
negative and negative numbers are less than
positive numbers. What would you tell
Franklin? Explain.
Solve
(-5)(-3) =
(-4)12 =
(-5)(-10) =
(-17)(0) =
The Identity Property of Addition says that the
sum of any number and zero is equal to the
original number.
a+0=a
The Zero Property of Multiplication says that the
product of any number and zero is equal to zero.
ax0=0
Signs of Factor and Products
Complete the Table
Factor A Factor B Product
+
+
–
–
+
–
–
+
Flora made 7 withdrawals of
$75.00 each from her bank
account. What was the overall
change in her account?
A football team lost 5 yards on each of
3 plays. Find the team’s change in
position after the 3 plays.
The temperature dropped 2⁰F every
hour for 6 hours. What was the total
number of degrees the temperature
changed in the 6 hours?
Exit Ticket
1. -12(-1) =
2. 14(-2) =
3. (-18)(2) =
4. (-20)(9) =
5. (-5)(0) =
6. (-7)(-8) =
7. The temperature dropped 3⁰F every hour for
6 hours. How much did the temperature
change in all? Express your answer as an
integer.
8. Every Friday for 6 weeks, Jason withdrew
$20.00 fro his savings account. How much
was the overall change in his account?
Express your answer as an integer.