Transcript 1.8 Dividing Rational Numbers

1.8 DIVIDING RATIONAL
NUMBERS
I CAN USE THE RULES FOR DIVIDING INTEGERS TO DIVIDE RATIONAL NUMBERS
AND SOLVE PROBLEMS BY DIVIDING RATIONAL NUMBERS.
RECALL RULES FOR DIVIDING INTEGERS
• Same sign: quotient is positive
• Different signs: quotient is negative
DIVIDING DECIMALS
• Make the divisor a whole number by multiplying.
• EX:
EXAMPLE CONTINUED
DIVIDING FRACTIONS
• When dividing fractions you multiply by the reciprocal.
𝑎
𝑏
• The reciprocal of 𝑏 is 𝑎
• Remember that mixed numbers must be written as improper fractions!
•
•
1
1
2
3
=
2
PRACTICE
•
5
6
÷
2
−
3
• 16.9÷1.3
•
3
4
8
÷
1
2
APPLICATION
• How many
1
1
2
oz servings of cereal are in the larger
oz cereal box?
• 13 servings
1
19
2
ASSIGNMENT
• ODDS ONLY
• P.45 #7-25