Curriculum / Math / 4th Grade / Unit 4: Fraction Equivalence and Ordering / Lesson 4
Math
Unit 4
4th Grade
Lesson 4 of 15
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Lesson Notes
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Determine whether a given number is prime or composite.
The core standards covered in this lesson
4.OA.B.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.
The essential concepts students need to demonstrate or understand to achieve the lesson objective
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25-30 minutes
Ms. Cole also wants to set up the desks in her room in rows and columns. There are 23 desks in her classroom. What are the different ways she could make rows and columns with 23 desks? Draw arrays to represent the possible arrangements.
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A composite number is a whole number that can be written as a product of two whole numbers, neither of which is itself.
Is 28, the number of students in Mr. Duffy’s class from Lesson 3, a prime or composite number? How do you know?
Grade 4 Mathematics > Module 3 > Topic F > Lesson 22 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Determine whether each of the following numbers are prime or composite.
a. 74
b. 61
c. 49
d. 30
e. 2
f. 1
In North America, we have a kind of cicada that only emerges from the ground every 17 years at the very end of its life cycle.
a. If a cicada's predator has a life cycle of 1 year, how many generations of that predator would it take before it could prey on cicadas?
b. If a predator’s life cycle was 2 years, how many generations would it take before it could prey on cicadas?
c. What if the predator's life cycle was 3 years?
d. 5 years?
e. Based on your answers to Parts (a)-(d), what kind of advantage does its 17-year life cycle give a cicada in the wild?
Cicada Swarmaggedon by Brian Marks and Lesie Lewis is made available on YummyMath. Copyright © 2017 Yummy Math. All Rights Reserved. Accessed Jan. 8, 2018, 1:37 p.m..
15-20 minutes
Problem Set
A task that represents the peak thinking of the lesson - mastery will indicate whether or not objective was achieved
5-10 minutes
Determine whether the following numbers are prime or composite. Explain your reasoning.
a. 17
b. 46
c. 91
The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.
Extra Practice Problems
Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.
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Recognize and generate equivalent fractions with smaller units using tape diagrams.
Topic A: Factors and Multiples
Identify multiples and determine if a whole number is a multiple of another number.
Standards
4.OA.B.4
Explore patterns in multiples of various whole numbers.
Find factor pairs for numbers to 100 and recognize that a whole number is a multiple of each of its factors.
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Topic B: Equivalent Fractions
4.NF.A.1
Recognize and generate equivalent fractions with smaller units using number lines.
Recognize and generate equivalent fractions with smaller units using area models.
Recognize and generate equivalent fractions with smaller units using multiples.
Recognize and generate equivalent fractions with larger units using visual models.
Recognize and generate equivalent fractions with larger units using factors.
Topic C: Comparing and Ordering Fractions
Compare two fractions where one numerator or denominator is a factor of the other by replacing one fraction with an equivalent one.
4.NF.A.2
Compare two fractions by replacing both fractions with equivalent ones.
Compare two fractions using one whole as a benchmark.
Compare two fractions using one half as a benchmark.
Compare and order fractions using various strategies.
4.NF.A
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