⅔ Numerator/Denominator
0r Top Number /Bottom Number
Equivalent Fractions
 You can find an equivalent fraction by multiplying or
  dividing both numerator and denominator by the
  same whole number
 Example 1: Write 18/24 = ¾
                                         Divide the
 ¾ is equivalent to 18/24             numerator and
                                     denominator by the
                                    same whole number
Equivalent Fractions
Example 2: 3/7 = 9/21
                                 Multiply the
   3/7 is equivalent to 9/21   numerator and
                                     the
Examples:                      denominator by
                               the same whole
 9/10 = 90/?                      number
 5/6 = ?/36
 ?/4 = 12/16
 8/? = 72/54
Ordering fractions
 Write these fractions in order starting with the largest.
 1/3 , 2/5 , 3/10, 1/6
 Step 1: Decide on common denominator to use
        Find a common multiple of 3,5,10 and 6
 Step 2: Re write the fraction as their equivalent
  fractions using 30 as denominator ( make denominator
  30 in all fractions)
 1/3       2/5       3/10    1/6
 10/30 12/30         9/30    5/30
Order Fractions
 Step 3: Write them in order looking at the numerators
 12/30   10/30 9/30 5/30 ( order from largest)



 2/5     1/3   3/10   1/6 ( Write original fractions in
 order)
Order these Fraction
 Put each of these sets of fractions in order of size
  ,smallest first
 ¾ , , 10/12 , 2/3
 2/3, 4/5, 11/15, 5/6
 ¼, 3/8, 1/3
Mixed Numbers
 Example 1: Write 23/7 as a mixed number
 23÷ 7 =3 remainder 2
Step 1 :do the division




Step 2 :As this is 3 whole ones with 2 left over,
Write mixed number as
Mixed Numbers
 39/4




 20/3



 17/5
Improper Fraction
 Write 5⅗ as an improper fraction




                                      Top number
                                        is larger
                                     than bottom
                                     number .e.g.
                                           13/4
Improper Fraction
 Write these mixed numbers as improper fractions.
4⅜


 7⅘


 3⅚


 2⅕
Fraction of an amount
 1/3 x 27


 ½ x 500


 2/5 of 720


 17 x 5/7


 5/6 of 1 day
 1/7 x 63


 2/9 of 729


 2/3 of 2kg


 1/25 x 1 hour


 5/12 x 1 litre
One quantity as a fraction of
another                               Write £6 as 600p
1.   Write 40p as a fraction of £6    and then write 40
                                          over 600.
                                        Remember to
                                        simplify your
                                           answer




2. In Dina ‘s class there are 13 boys and 14 girls.
     What fraction of the class are boys?
                                              13+14 = 27 students
                                                  altogether
Try yourself
1. In Polly’s dog training class, three of the dogs pass their
   elementary certificate. The other four do not pass. What
   fraction of the dogs pass?
2. Donna said, I've got 5 red sweets and 9 blue sweets so the
   fraction of my sweets that are red is 5/9.Is Donna correct/
   Explain your answer.
3. In each case, write the first quantity as a fraction of the
   second,
 20p,£2
 30cm, 1m
 5days, 2 weeks
Add and Subtract Fractions with
same denominators
 1/5 + 2/5 =


 ¼ + 2/4 =
                            Same
                     denominators, just
                     add or subtract the
 3/5 - 1/5 =           numerators.


 3/7 – 1/7 =
Add and Subtract fraction with
different denominators
 Work out 5/8 + 3/7
  5/8   ( multiply top and bottom number by 7)




 3/7 ( multiply top and bottom number by 8)
More Examples
 2 ⅟4 + 3⅟5   ( First add whole numbers. Then add the fractions)

 2+3 =5 and then ⅟4 + ⅕ ( Change both denominators to 20)


    ⅟4 + ⅕


    5/20 + 4/20 = 9/20
Try Yourself
 9/10 + 2/7
 ¾ + 1/9
 5/6 + 3/7
 1 ⅟2 + 2 ⅛
 7/8 – ¾
 1/4 -1/20
 4 ⅘ - 3 9/10
Multiply Fractions
 3/7 x 4/6     1: Write any mixed numbers as
                       improper fraction
                    2: Multiply numerators
                  together and denominators
                           together.

                    3:Simplify if possible

 1 ⅟2 + 2 ⅛
More Examples
 4/6 x 6/7


 5/9 x 8/11


 2⅘ x 3⅜
Divide Fractions
       ¼ ÷⅗
 Work out

¼ x5/3 →Turn the second fraction
             upside down and multiply
More Examples
 15/16 ÷ 5




 3 ⅟2 4⅗     →change mixed numbers to improper fraction



              → Turn the second fraction upside down and multiply
Try Yourself
 1/3 ÷ 6/7
 1 ÷ 7/12
 7/10 ÷ 2⅘
 3⅛ 6
 1⅗ 5⅔
 5/8 1/3
 2⅛ 10

Fractions by si

  • 1.
    ⅔ Numerator/Denominator 0r TopNumber /Bottom Number
  • 2.
    Equivalent Fractions  Youcan find an equivalent fraction by multiplying or dividing both numerator and denominator by the same whole number  Example 1: Write 18/24 = ¾ Divide the  ¾ is equivalent to 18/24 numerator and denominator by the same whole number
  • 3.
    Equivalent Fractions Example 2:3/7 = 9/21 Multiply the 3/7 is equivalent to 9/21 numerator and the Examples: denominator by the same whole  9/10 = 90/? number  5/6 = ?/36  ?/4 = 12/16  8/? = 72/54
  • 4.
    Ordering fractions  Writethese fractions in order starting with the largest. 1/3 , 2/5 , 3/10, 1/6  Step 1: Decide on common denominator to use Find a common multiple of 3,5,10 and 6  Step 2: Re write the fraction as their equivalent fractions using 30 as denominator ( make denominator 30 in all fractions)  1/3 2/5 3/10 1/6  10/30 12/30 9/30 5/30
  • 5.
    Order Fractions  Step3: Write them in order looking at the numerators  12/30 10/30 9/30 5/30 ( order from largest)  2/5 1/3 3/10 1/6 ( Write original fractions in order)
  • 6.
    Order these Fraction Put each of these sets of fractions in order of size ,smallest first  ¾ , , 10/12 , 2/3  2/3, 4/5, 11/15, 5/6  ¼, 3/8, 1/3
  • 7.
    Mixed Numbers  Example1: Write 23/7 as a mixed number  23÷ 7 =3 remainder 2 Step 1 :do the division Step 2 :As this is 3 whole ones with 2 left over, Write mixed number as
  • 8.
  • 9.
    Improper Fraction  Write5⅗ as an improper fraction Top number is larger than bottom number .e.g. 13/4
  • 10.
    Improper Fraction  Writethese mixed numbers as improper fractions. 4⅜  7⅘  3⅚  2⅕
  • 11.
    Fraction of anamount  1/3 x 27  ½ x 500  2/5 of 720  17 x 5/7  5/6 of 1 day
  • 12.
     1/7 x63  2/9 of 729  2/3 of 2kg  1/25 x 1 hour  5/12 x 1 litre
  • 13.
    One quantity asa fraction of another Write £6 as 600p 1. Write 40p as a fraction of £6 and then write 40 over 600. Remember to simplify your answer 2. In Dina ‘s class there are 13 boys and 14 girls. What fraction of the class are boys? 13+14 = 27 students altogether
  • 14.
    Try yourself 1. InPolly’s dog training class, three of the dogs pass their elementary certificate. The other four do not pass. What fraction of the dogs pass? 2. Donna said, I've got 5 red sweets and 9 blue sweets so the fraction of my sweets that are red is 5/9.Is Donna correct/ Explain your answer. 3. In each case, write the first quantity as a fraction of the second,  20p,£2  30cm, 1m  5days, 2 weeks
  • 15.
    Add and SubtractFractions with same denominators  1/5 + 2/5 =  ¼ + 2/4 = Same denominators, just add or subtract the  3/5 - 1/5 = numerators.  3/7 – 1/7 =
  • 16.
    Add and Subtractfraction with different denominators  Work out 5/8 + 3/7 5/8 ( multiply top and bottom number by 7) 3/7 ( multiply top and bottom number by 8)
  • 17.
    More Examples  2⅟4 + 3⅟5 ( First add whole numbers. Then add the fractions)  2+3 =5 and then ⅟4 + ⅕ ( Change both denominators to 20) ⅟4 + ⅕ 5/20 + 4/20 = 9/20
  • 18.
    Try Yourself  9/10+ 2/7  ¾ + 1/9  5/6 + 3/7  1 ⅟2 + 2 ⅛  7/8 – ¾  1/4 -1/20  4 ⅘ - 3 9/10
  • 19.
    Multiply Fractions  3/7x 4/6 1: Write any mixed numbers as improper fraction 2: Multiply numerators together and denominators together. 3:Simplify if possible  1 ⅟2 + 2 ⅛
  • 20.
    More Examples  4/6x 6/7  5/9 x 8/11  2⅘ x 3⅜
  • 21.
    Divide Fractions ¼ ÷⅗  Work out ¼ x5/3 →Turn the second fraction upside down and multiply
  • 22.
    More Examples  15/16÷ 5  3 ⅟2 4⅗ →change mixed numbers to improper fraction → Turn the second fraction upside down and multiply
  • 23.
    Try Yourself  1/3÷ 6/7  1 ÷ 7/12  7/10 ÷ 2⅘  3⅛ 6  1⅗ 5⅔  5/8 1/3  2⅛ 10