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Divide Rational Numbers. Objective The student will be able to:

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Presentation on theme: "Divide Rational Numbers. Objective The student will be able to:"— Presentation transcript:

1 Divide Rational Numbers. Objective The student will be able to:

2 Dividing Rules 1) If the numbers have the same signs then the quotient is positive. -32 ÷ (-8 )= 4 2) If the numbers have different signs then the quotient is negative. 81 ÷ (-9) = -9

3 When dividing two negative numbers, the quotient is positive. 1.True 2.False Answer Now

4 When dividing a negative number and a positive number, use the sign of the larger number. 1.True 2.False Answer Now

5 The reciprocal of is where a and b  0. The reciprocal of a number is called its multiplicative inverse. A number multiplied by its reciprocal/multiplicative inverse is ALWAYS equal to 1.

6 Example #1The reciprocal of is Example #2 The reciprocal of -3 is

7 Basically, you are flipping the fraction! We will use the multiplicative inverses for dividing fractions.

8 Which statement is false about reciprocals? 1.Reciprocals are also called additive inverses 2.A number and its reciprocal have same signs 3.If you flip a number, you get the reciprocal 4.The product of a number and its reciprocal is 1 Answer Now

9 When dividing fractions, change division to multiplying by the reciprocal. Examples 1)

10 2)

11 What is the quotient of -21 ÷ -3? 1.18 2.-18 3.7 4.-7 Answer Now

12 1.. 2.. 3.. 4..


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