West Contra Costa Unified School District
Divisibility Rules Justified
How do you know if a number is divisible? Instructors first prove the divisibility rules for three and four and then class members use this modeling to prove given divisibility rules for eight and nine either individually or in groups.
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A Prime Investigation wtih 7, 11, and 13
Ninth graders investigate divisibility rules. In this middle school mathematics/Algebra I lesson, 9th graders explore the divisibility rules of 7, 11, and 13. Students examine certain six-digit numbers that are divisible by 7, 11, and 13.
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Number Theory
Learners explore the concept of number theory. They discuss an assortment of number theory topics such as prime numbers, composite numbers, GCF, modular arithmetic, and others in a lecture style discussion. Pupils view videos about these...
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Greatest Common Factor: Using the Factor Tree
Students find the greatest common factor of two numbers. In this algebra lesson, students use prime factorization to find their factor to simplify equations. they create a factor tree to find the factors of composite numbers.
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Calendar Computation
Students solve math problems by using a calendar. For this problem solving lesson, students review the days of the week and months in a year. Students complete a problem solving worksheet about the calendar.
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Prime Factorization
Students work with prime numbers. In this prime factorization lesson, students review writing numbers in their prime factorization form and solve multiple problems.
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Measurement and Problem Solving
Students solve problems using a calendar. In this calendar lesson, students complete a worksheet of math story problems. Example problems are provided.
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Linear Inequalities
Ninth graders practice recognizing similarities and differences found in the graphing of inequalities and equations. Once observatioons are made they solve some of their own applying prior knowledge.
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Order of Operations: Pages 19-24
In this math worksheet, students evaluate 15 expressions using the order of operations. Students then evaluate 4 more expressions with given numerical values for variables.