Multiplying Integers
Objective: Multiply integers

Vocabulary:  multiplicand, multiplier, product, multiplicative identity
Multiplication is repeated addition.  The number being multiplied is called the multiplicand.  The number doing the multiplying is called the multiplier.  The answer is called the product.
Symbols used to indicate multiplication:

 8 X 5     Times sign

 8 * 5      Raised dot

 8(5) or (8)5 or (8)(5)  Parentheses

 8y means 8 times y

 xy means x times y

 

 

Rules for Multiplying Integers

1.  A positive number times a positive number equals a positive number.

1.  5 X 4 = 20

2.  A positive number times a negative number equals a negative number.

2.  5 x (-4) = -20

3.  A negative number times a positive number equals a negative number.

3.  -5 x (4) = -20

4.  A negative number times a negative number equals a positive number.

4.  -5 x (-4) = 20

In simpler terms: Like signs multiplied together the answer is positive.  Unlike signs multiplied together the answer is negative.
When zero is multiplied by any number, the result is zero.  Example 4 x 0 = 0

When 1 is multiplied by any number, the result is the number itself.  One is called the multiplicative identity.  Example - 4 x 1 = - 4

Multiplying Two Integers

Integers

Products
(+4)(+9)= +36
(-3)(+12)= -36
(-6)(-5)= +30
(-14)(+6)= -84

Multiplying Three Integers

Integers

Product of First and Last Two

Product
(+5) (+3) (+2) (+5) (+6) = +30
(+8) (+2) (-5) (+8) (-10) = -80
(-9) (-3) (+2) (-9) (-6) = +54
(-4) (-3) (-5) (-4) (+15) = -60

 

On Your Own
(-5)(-13)= (-8)(-6)=

(+11)(+3)=
(+9)(-7)= (+12)(+4)=

(-10)(-2)=
(+7)(+3)(+6)= (-2)(-6)(-12)=

(-3)(+5)(-6)=
(-4)(-3)(+6)= (+5)(+4)(-3)=

(+6)(+1)(-5)

Click Here For Answers

 

Game

Test your skills by taking the Multiplication Integers Quiz.

Remember to ask Ms.Painter for the password.

Then click on Adding Integers Quiz

Answers
+65 +48

+33
-63 +48

+20
+126 -144

+90
+72 -60

-30