This past week we reviewed how to find/use the GCF (Greatest Common Factor) to write a fraction in simplest form (lowest terms) using the “T-chart” method they were taught last year in 4th grade.
I also taught them how to use a Prime Factor Tree to find the GCF. We will begin computation (+/-) with fractions and mixed numbers Monday and they MUST know how to quickly and efficiently write their answers in Simplest form every time they add/subtract fractions/mixed numbers.
Please look for and help them with homework to ensure they are using these skills correctly. I want parents to help (not do for) their children at home. If you are not sure what they are doing, please look in their notebooks. There are ALWAYS step by step directions with completed examples to help you help your child.
Remember!There will be a prime/composite # quiz one day this week.Your homework for the weekend was to take your notebook home and to review prime/composite #’s. You must memorize the 4 divisibility rules and the exceptions if you expect to do well on this quiz.
FYI-I teach prime/composite #’s before we begin working with fractions because you will be taught how to use prime number factorizations to find the GCF in order to simplify fractions.
Homework: Prime/Composite/Even/Odd # worksheet.
Don’t just copy from notebook.
Use divisibility rules and remember the “exceptions”.
Homework 1/21/15: Please spend time reviewing prime and composite #’s with your kids. They need to be able to pick out the prime or composite numbers given a set of random numbers from 1-100.
I taught them a military cadence (in their notebooks) and a rap. The rap video can be viewed by clicking on the “links” tab above.
I also taught them 4 divisibilty rules that work for all but a handful of exceptions (1, 2, 49, 77, 91). The only way to get good at this is to practice. I will send homework home tomorrow. Memorize and use these rules!!
We began prime/composite #’s today. Students struggle memorizing all 100. I suggest that they memorize just 7 divisibilty rules to help them determine if a number is prime or composite. Help them please. Making flash cards with the rules on them and examples of each might make it more fun.
I also showed them a rap and a song (sung to the “i don’t know what I’ve been told” military cadence) they can memorize if they prefer. It is in their notebooks!
Homework: Study for Circles Quiz tomorrow 1/16. Refer to your notebook for examples. You need to know the parts of circle and how to find the radius if given the diameter and vise versa and find approximate circumference given radius or diameter.