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Do Now. Solve . Write in simplest form. 10/8/2014 2-3 B Divide Whole #’s by Fractions. Student Example. Reciprocal - one of two numbers with a product of 1 -in real terms- flip the numerator and denominator. =. Example 1. Example 2. Find the reciprocal of 7. Method:. - PowerPoint PPT Presentation
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Do NowSolve. Write in simplest form.
10/8/2014 2-3 B Divide Whole #’s by Fractions
Reciprocal- one of two numbers with a product of 1-in real terms- flip the numerator and denominator
=
Student Example
Example 1
Example 2Find the reciprocal of 7.
Method:
• To divide a whole number by a fraction, multiply its reciprocal.
KCFEEP
HANGE
LIP
• Step 1 – Keep your first fraction.
÷4
31
1 = 31
Example 3
• Step 2 – Change the operation to multiplication.
÷4
31
1 = 31 x
• Step 3 – Flip the second fraction.
÷4
31
1 = 31 x 1
4
• Step 4 – Multiply the numerators, then multiply the denominators.
x 131
4 = 121
• Step 5 – Simplify (if possible).
x 131
4 = 121 =12
Example 4
Multiply numerators. Multiply denominators.
Example 5
Multiply by the reciprocal.
2
1
Divide 4 and 2 by the GCF, 2.
Simplify.
Answer: So, there are 6 runners in the race.
Your Turn!
Homework
• Pg. 122 #1-28 Evens• Ch. 1 Test Corrections due tomorrow!