## Factors
9/28/2015
FactorsCommon Core State Standards: 4.OA.4 Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite. Essential Vocabulary: • multiplication/multiply • division/divide • area • array • factor pair • factor • prime • composite • product • area model Unit Overview:In this unit, students will use their knowledge from 3rd grade on multiplication factors to help them find factor pairs using area model/arrays. Students will use their knowledge of finding factor pairs to determine if a number is prime or composite. In addition, for the first time students will learn about prime and composite numbers in relation to rectangular arrays. Students will not be required to use the standard algorithm until 5th grade. Strategies/Skills:Students will build on their understanding of addition and subtraction by using place value strategies to make sense of the standard algorithms. They are expected to use a variety of models to support their reasoning about numbers. • Area Model/Arrays • Relationship between multiplication & division (through various properties) Video Support:Video support can be found on LearnZillion. • http://learnzillion.com o Find all the factor pairs of a number using area models https://learnzillion.com/lessons/780-find-all-the-factor-pairs-of-a-number-using-area-models o Determine multiples of a number using area models o Determine if a number is prime or composite using area models https://learnzillion.com/lessons/781-determine-multiples-of-a-number-using-area-models https://learnzillion.com/lessons/786-determine-if-a-number-is-prime-or-composite-using- area-models
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## Adding & Subtracting Whole Numbers
9/16/2015
Adding and Subtracting Whole NumbersCommon Core State Standards: 4.NBT.3 Use place value understanding to round multi-digit whole numbers to any place. 4.NBT.4 Fluently add and subtract multi-digit whole numbers using the standard algorithm. 4.OA.3 Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding. Essential Vocabulary:• place value vocabulary from previous unit • multiplication/multiply • division/ divide • subtraction/subtract • reasonableness • mental computation In this unit, students will apply their understanding of place value to help solve for multi-step word problems with addition and subtraction. Students will utilize estimation as part of the problem solving process. One example is students rounding to the nearest leading digit. This will help students to check their solution or answer after solving to see if it is reasonable. In addition, students will need to be fluent with numbers in order to break them apart or reconstruct them by place value. Students will build on their understanding of addition and subtraction by using place value strategies to make sense of the standard algorithms. They are expected to use a variety of models to support their reasoning about numbers. • Base Ten blocks • Show Subtotals Method • Relationship between multiplication & division Video Support can be found on The WCPSS Academics YouTube Channel.• http://tinyurl.com/WCPSSAcademicsYouTube http://www.youtube.com/watch?v=sWXsaia- Nd4&index=3&list=PLNDkuWRw1gGRpuFSgmHjf07KamFfjq8Gz Video support can be found on LearnZillion. • http://learnzillion.com o Solve multi-step word problems by rounding on a number line. o Solve multi-step word problems using front-end estimation https://learnzillion.com/student/lessons/1719-solve-multistep-word-problems-by-rounding- on-a-number-line https://learnzillion.com/student/lessons/1720-solve-multistep-word-problems-using-frontend- estimation |
## Mrs. Ana RhyneI teach 4th grade math and science at Weatherstone Elementary School. I graduated from Meredith College with a BA in Spanish and K-6 licensure. ## Archives
May 2016
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