One Stop Shop for Math Teacher Resources

# Divide by Fractions

Divide by Fractions
We will divide whole numbers by fractions.
Examples:
1).

Step 1: When dividing a whole number by a fraction change the whole number to a fraction by placing it over 1.

Step 2: Use KCF (Keep, Change, and Flip) when dividing fractions. Keep 6/1, change division to multiplication, and Flip 1/3 to 3/1.

Step 4: Multiply numerators, 6 x 3= 18 and multiply denominators, 1 x 1= 1 and simplify if needed.

We will divide fractions.

2).

Step 1: Use KCF (Keep, Change, and Flip)

when dividing fractions. Keep 1/4, change division to multiplication, and flip 3/8 to 8/3.

Step 2: Multiply numerators, 1 x 8=8 and multiply denominators, 4 x 3=12.

Step 3:Simplify using GCF

Find GCF:

Factors of 8 :1,2,4, and 8

Factors of 12:1,2,3,4,,6, and 12

Common factors of 8 and 12: 1,2, and 4. Although all bold numbers are common factors of 8 and 12, 4 is the greatest common factor. We divide the numerator and denominator by 4.

We will divide mixed numbers

3).

Step 1: First, we need to change both mixed numbers to improper fractions.

Step 2:Use KCF (Keep, Change, and Flip) when dividing fractions. Keep 21/5, change division to multiplication, and flip 7/3 to 3/7.

Step 3: Multiply numerators, 21 x 3= 63 and multiply denominators, 5 x 7=35.

Step 4: Simplify using GCF

Find GCF.

Factors of 63: 1, 3, 7, 9, 21, and 63

Factors of 35: 1, 5, 7, and 35. Although all bold numbers are common factors of 63 and 35. 7 is the greatest common factor. We divide the numerator and denominator by 7.

Step 3: We have to change the improper fraction 9/5 to a mixed number. 5 can go evenly into 9 only once with a remainder of 4. The denominator does not change. 1 is the whole number and the remainder 4 is the numerator.

Videos:

Found on the Web:

PowerPoint:

Dividing Fractions

Views: 2482

Comment

### You need to be a member of Math Concentration to add comments!

Join Math Concentration

## Advertising Information

If you represent a company and would like advertising, sponsorship, or promotions information, CLICK HERE to request our media kit.

## Make a Difference

Please support our community of students, parents, and teachers or caregivers who all play vital roles in the homework process by contributing whatever you can to keep our site alive :)

## Notes

### Figure This Challenge #56

• Complete Solution will be given on May 17, 2015

Complete Solution:

…

Continue

Created by Wanda Collins May 10, 2015 at 1:56pm. Last updated by Wanda Collins May 10, 2015.

## Math Homework Help Online

Professional math homework help get your math solved today.

Do you need help with math homework? Our reliable company provides only the best math homework help.

Try best college paper writing service to get the best custom essays for affordable prices

# Math Limerick

Question: Why is this a mathematical limerick?

( (12 + 144 + 20 + 3 Sqrt[4]) / 7 ) + 5*11 = 92 + 0 .

Answer:

A dozen, a gross, and a score,
plus three times the square root of four, divided by seven, plus five times eleven, is nine squared and not a bit more.

---Jon Saxton (math textbook author)

Presentation Suggestions:
Challenge students to invent their own math limerick!

The Math Behind the Fact:
It is fun to mix mathematics with poetry.

Resources:

Su, Francis E., et al. "Math Limerick." Math Fun Facts.

funfacts

• Add Photos
• View All

## Badge

Loading…
 Rate our website @ Web site development resources Directory Bestcatalog.net Excellent!    Very Good    Good    Fair    Poor &

© 2019   Created by Wanda Collins.   Powered by