Add and Subtract Fractions
To All January Birthday Kiddos!!!!!
ARCADEMIC CUP PRACTICE
Thursday, January 26, 2017
Addition With Unlike Denominators Lesson 6.1
Common Core Standard - CC.5. NF.2
YOU WILL NEED
P121 FROM THE ASSIGNMENT BOOK
LEAST COMMON DENOMINATOR
First Trick to Adding Unlike Denominators
EXAMPLES OF TRICK 1
4/5 + 1/15
Second Trick to Adding with Unlike Denominators
To find the least common denominator, simply list the multiples of each denominator (multiply by 2, 3, 4, etc. out to about 6 or seven usually works) then look for the smallest number that appears in each list.
Example: Suppose we wanted to add 1/5 + 1/6 + 1/15. We would find the least common denominator as follows…
- First we list the multiples of each denominator.
Multiples of 5 are 10, 15, 20, 25, 30, 35, 40,…
Multiples of 6 are 12, 18, 24, 30, 36, 42, 48,…
Multiples of 15 are 30, 45, 60, 75, 90,….
- Now, when you look at the list of multiples, you can see that 30 is the smallest number that appears in each list.
- Therefore, the least common denominator of 1/5, 1/6 and 1/15 is 30.
3rd Trick to Adding with Unlike Denominators
Examples of Trick 3
1/2 + 3/5
Adding With Unlike Denominators
YOU DO - ASSIGNMENT
STEPS TO REDUCING FRACTIONS
1. ASK YOURSELF "IS THE NUMERATOR HALF OF THE DENOMINATOR.
IF "YES" THE FRACTION WILL REDUCE TO 1/2.
EXAMPLE - 4/12 = 1/3
2. ASK YOURSELF IF THE NUMERATOR WILL DIVIDE INTO THE DENOMINATOR.
IF "YES" DIVIDE BOTH THE NUMERATOR AND DENOMINATOR BY THAT NUMBER.
4 4 1
12 4 3
EXAMPLE - 6/8 = 3/4
3. IF 1 & 2 DO NOT WORK THEN YOU HAVE TO FIND THE "GREATEST COMMON FACTOR" THAT WILL GO INTO THE NUMERATOR AND DENOMINATOR.
6 2 3
8 2 4
FRIDAY, JANUARY 27, 2017
LET'S BEGIN WITH "KAHOOT"
WE DO - REVIEW/PRACTICE ADDING FRACTIONS/IMPROPER FRACTIONS
LABEL YOUR PAPER:
MATH BLOCK _____
IXL ADD FRACTIONS WITH UNLIKE DENOMINATORS
JANUARY 27, 2017
LOG IN TO "IXL".
GO TO 5TH GRADE. FIND L8 - ADDING FRACTIONS WITH UNLIKE DENOMINATORS
LISTEN FOR DIRECTIONS
MONDAY, JANUARY 30, 2017
Catch up and Review
TUESDAY, JANUARY 31, 2017
REVIEW REDUCING FRACTIONS
PRACTICE, PRACTICE, PRACTICE
LABEL YOUR PAPER - NAME, MATH BLOCK _____, IXL FRACTIONS REVIEW, JAN. 31, 2017
K4 - REDUCING FRACTIONS - EVEN IF YOU CAN ANSWER IN YOUR HEAD WRITE THE PROBLEM/ANSWER ON PAPER. :-) NUMBER EACH PROBLEM.
L10 - SUBTRACTING FRACTIONS - WRITE ALL PROBLEMS/ANSWERS ON PAPER. NUMBER EACH PROBLEM.
FINISHED WHAT NOW?????
READ A.R. and TEST QUIETLY!!!!!!!!!!!!!!!!!!!!!!!
WEDNESDAY, FEBRUARY 1, 2017
Catch Up and Clean Out
HOLD ON TO THEM UNTIL I ASK FOR THEM.
Wait for directions.
Let's Learn Time
Textbook Pages 260-261
Assignment Book Pages P129-P130
We Will Practice/Learn Together
We will work the ODD problems together on paper.
Partner Time Practice/Learn
On Your Own Time Practice/Learn
It will be due tomorrow.
I Am Finished..........What Can I Do?
Read and test A.R.
Practice for the Arcademic Cup