wednesday, october 26 th 26 th 11 th
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Please take out your Math worksheet and complete warm up Did you write down your homework?!?! . Warm Up. Wednesday, October 26 th 26 th 11 th. Find the prime factorization of 91 Find the product of .033 x .02. Corny Joke of the Day. What did the first casket say to the second casket? - PowerPoint PPT PresentationTRANSCRIPT
Wednesday, October 26th 26th 11th
• Please take out your Math worksheet and complete warm up
• Did you write down your homework?!?!
1. Find the prime factorization of 91
2.Find the product of .033 x .02
Warm Up
Corny Joke of the Day
What did the first casket say to the second casket?
Is that you COFFIN?
Schedule for the Week
Remember…..
Checkpoint on Friday!
Retest? 75 and above you will
complete a packet 74 and below you are eligible
for a reteach Monday 10/31 will be the
reteach Wednesday 11/2 will be the
retest
Retest Qualifications All Homework must from
unit must be complete before you retake the test
Retest form Retake packet must be
complete before you retake the test
Homework AnswersCan you find my mistakes?
a.4/6 b. ¾ c. ½ d.¼ e.3/9f. 2/3 g.3/5 h.½ i. 2/12j. ½k. ¼
l. 2/3 m.4/5 n.3/6 o.6/8p.2/3 q.1/3r. 3/5 s. ½t. 6/12
What did mickey do wrong?
10 812 12
212
UNIT #2Fractions
+, -, x, and ÷
Todays MissionAdding and subtracting with unlike
denominators
How do we add when we don’t have common denominators?!?
1 32 4
Make EQUIVALENT Fractions!!!
Fractions that represent the same value are equivalent.
Remember!
To add or subtract unlike fractions, first rewrite them
as equivalent fractions with a common denominator.
• You can use any common denominator. But it will be easier to find the least common denominator to add and subtract unlike fractions.
• The least common denominator (LCD) is the least common multiple of the denominators.
How do we do this?
1 32 4
Practicing Equivalent Fractions
Make equivalent Fractions by finding the LCD
1. ½ and 1/8
2. 1/3 and 7/9
3. 5/10 and 9/12
4. 6/7 and ¾
Practicing Equivalent Fractions
Make equivalent Fractions by finding the LCD
1. ½ and 1/8
2. 1/3 and 7/9
3. 5/10 and 9/12
4. 6/7 and ¾
Time to + and -!!! Steps for unlike denominators
1. Find the LCD for the two denominators by looking for LCM
2. Make equivalent fractions by multiplying both the numerator and denominator by the same number (to get LCD)
3. Add the numerators, leave your denominator
4. If needed, simplify
1112__ 3
8__
–1112__ 3
8__
–2224__ 9
24__
Multiples of 8: 8, 16, 24, … The LCD is 24. Write equivalent fractions with a common denominator.
Subtract. 1324__
Multiples of 12: 12, 24, … -
Just Watch
47__ 1
3__
–47__ 1
3__
–1221__ 7
21__
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, …The LCD is 21. Write equivalent fractions.
Subtract. 521__
Multiples of 7: 7, 14, 21, …
-
Let’s Try Together!
Add or subtract. Write each answer in simplest form.
1. + 2. –
3. – 4. +
5. Bonnie is making oatmeal bars and the recipes calls for cup of brown sugar. If she has cup of brown sugar, how much more does she need?
38__ 1
6__ 1
2__ 1
8__
512__ 1
6__ 1
6__ 1
8__
34__
13__
1324__ 3
8__
14__ 7
24__
512__ cup
Group Work
SummaryMake up 2 truths and 1 lie about fractions
Put the three statements on the front
Put the lie on the back of the card
HomeworkWorkbookPage 35
Section 5-2+ and – with unlike
denominators
*Remember to show your work