How can we use what we know about multiplying positive and negative integers to solve a division problem? 12 ÷ 4 = 3 12 = 4 x 3
Feb 06, 2016
How can we use what we know about multiplying positive and negative
integers to solve a division problem?
12 ÷ 4 = 312 = 4 x 3
In this lesson you will learn rules for dividing positive and
negative integers by using the inverse relationship between
multiplication and division.
Let’s ReviewLet’s Review
5 x -4 = -20
-6 x (-3) = +18
Let’s ReviewA Common Mistake
Even though we are dividing two negative integers, the answer is not
negative.
-12 ÷ -4 = + 3
Let’s ReviewCore Lesson
3 x 5 = 15
15 ÷ 3 = 5
15 ÷ 5 = 3
What do we mean by the inverse of multiplication and division?
Let’s ReviewCore Lesson
18 ÷ 3 = ?
3 x
18 ÷ 6 = 3
Think about inverse relationship
6? = 18
Let’s ReviewCore Lesson
-2 x 5 = -10
-10 ÷ 5 = -2
-10 ÷ -2 = +5
Think about inverse relationship
Let’s ReviewCore Lesson
?
-16 ÷ 8 = ?
8 x
-16 ÷ 8 = -2
Think about inverse relationship
-2 = -16
Let’s ReviewCore Lesson
-3 x -4 = +12
+12 ÷ -3 = -4
+12 ÷ -4 = -3
Think about inverse relationship
Let’s ReviewCore Lesson
?
-20 ÷ (-4) = ?
-4 x
-20 ÷ -4 = +5
Think about inverse relationship
+5 = -20
In this lesson you have learned the rules for dividing positive
and negative integers by using the inverse relationship
between multiplication and division.
Let’s ReviewGuided Practice
Find the quotient:
-30 ÷ 6 =
-28 ÷ (-4) =
-5
7
Let’s ReviewExtension Activities
Without solving determine if the answer is positive or negative
Let’s ReviewQuick Quiz
Find the Quotient:-12 ÷ 4 = -40 ÷ (-10)=
-27 ÷ (-9) = -10 ÷ 5 =