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Fraction Addition and Subtraction

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Our standard for this week is 5.NF.1 Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent ... – PowerPoint PPT presentation

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Title: Fraction Addition and Subtraction


1
Whipping up some tasty Fractions!
  • Fraction Addition and Subtraction

2
How can I add FRACTIONS?
Hello there young mathematicians! It is I, Chef
Nemeril Pagasi. I am here today to help you learn
to add and subtract fractions with unlike
denominators!
3
How do we add fractions?
Lets begin with a review!
4
  • Our standard for this week is
  • 5.NF.1
  • Add and subtract fractions with unlike
    denominators (including mixed numbers) by
    replacing given fractions with equivalent
    fractions in such a way as to produce an
    equivalent sum or difference of fractions with
    like denominators. For example, 2/3 5/4 8/12
    15/12 23/12. (In general, a/b c/d (ad
    bc)/bd.)

5
  • Record these problems in your journal! Be sure
    to date the page, and show all the strategies you
    use to solve the problem!

6
When adding 7/12 3/12, why do you add the
numerators but keep the denominator the same?
7
The difference of two fractions is ¾. What
could the fractions be? Try to come up with more
than 1 set of answers!
8
How do you know that 2 1/2 3 2/3 gt 6?
9
Show the sum of ? ? using a number line?
10
Use the digits 2, 3, 4, 5, 8, and 9 to form two
different mixed numbers with a difference between
1 and 2.
11
Two fractions less than 1 result in a sum of 1 ?.
What could the fractions be?
12
Can you explain to me WHY we can not add
fractions with unlike denominators without first
changing the denominators? Can you relate
fractions to real world problem?
13
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