# CCSS 3 rd Grade Number and Operations – Fractions 1.1 Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal.

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CCSS 3 rd Grade Number and Operations – Fractions 1.1 Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. Lesson to be used by EDI-trained teachers only. READY TO TEACH SM EDI ® Lessons ©2013 All rights reserved. What are we going to do? What does determine mean? Determine means __________. CFU Students, sometimes we have to split a whole into equal parts. Now, we will call each equal part a unit fraction. Make Connection 1 figure out Vocabulary We will determine 1 the unit fraction of a whole. Learning Objective Activate Prior Knowledge Show how you would split a whole pie into 2 equal parts so that 2 people get the same amount? One WHOLE pie How would you split a whole pie into 4 equal parts so that 4 people get the same amount? Fractions: 4 th grade

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. CFU 2 shows Vocabulary Concept Development A unit fraction is a number that represents 2 one equal part of a whole. The whole must be divided into equal parts. The numerator of a unit fraction is always 1. The denominator represents the number of total equal parts. NOT Divided into Equal Parts Divided into Equal Parts is the 1 4 Unit Fraction is NOT the 3 4 Unit Fraction 1 4 1 4 1 4 1 4 Which figure below is divided so that one part is a unit fraction? How do you know? AB Which of the following numbers are unit fractions? How do you know? ABC 2 3 1 5 1 2 Which is the unit fraction of the figure? How do you know? 1 6 1 5 A B 1 4 numerator denominator Unit Fraction One-fourth shaded in

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Read the problem and identify what you are looking for. (underline) Determine the unit fraction. Write the numerator. Write the denominator. Hint: Count the number of total equal parts. Interpret 3 the unit fraction Determine the unit fraction of a whole. 1 2 3 a b A unit fraction is a number that represents one equal part of a whole. The numerator of a unit fraction is always 1. The denominator represents the number of total equal parts. 3 explain Vocabulary How did I/you determine the unit fraction? How did I/you interpret the unit fraction? CFU 2 3 Skill Development/Guided Practice 1. A circle has been divided into three equal parts. What is the unit fraction of the circle? 2. A circle has been divided into two equal parts. What is the unit fraction of the circle? The unit fraction is. 1 3 3 1 2 1 12 3 1 The unit fraction represents __ part of ___ equal parts. 2 1 1 4 numerator denominator Unit Fraction

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Skill Development/Guided Practice (continued) Read the problem and identify what you are looking for. (underline) Determine the unit fraction. Write the numerator. Write the denominator. Hint: Count the number of total equal parts. Interpret the unit fraction Determine the unit fraction of a whole. 1 2 3 a b A unit fraction is a number that represents one equal part of a whole. The numerator of a unit fraction is always 1. The denominator represents the number of total equal parts. How did I/you determine the unit fraction? How did I/you interpret the unit fraction? CFU 2 3 3. A rectangle has been divided into four equal parts. What is the unit fraction of the rectangle? 4. A rectangle has been divided into five equal parts. What is the unit fraction of the rectangle? The unit fraction is. 4 1 5 1 1 4 1 5 The unit fraction represents __ part of ___ equal parts. 4 1 5 1 1 4 numerator denominator Unit Fraction

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Skill Development/Guided Practice (continued) 5. A pizza was cut into six equal slices. What is the unit fraction of one slice of the pizza? 6. A pizza was cut into eight equal slices. What is the unit fraction of one slice of the pizza? The unit fraction is ____. 6 1 8 1 1 6 1 8 The unit fraction ___ represents __ part of ___ equal parts. 6 1 8 1 1 4 numerator denominator Unit Fraction How did I/you determine what the question is asking? How did I/you determine the math concept required? How did I/you determine the relevant information? How did I/you solve and interpret the problem? How did I/you check the reasonableness of the answer? CFU 2 1 3 4 5

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Skill Development/Guided Practice (continued) 7. A paper was cut into three equal pieces. What is the unit fraction of one piece of the paper? 8. A paper was cut into three equal pieces. What is the unit fraction of one piece of the paper? The unit fraction is ____. 3 1 3 1 1 3 1 3 The unit fraction ___ represents __ part of ___ equal parts. 3 1 3 1 1 4 numerator denominator Unit Fraction How did I/you determine what the question is asking? How did I/you determine the math concept required? How did I/you determine the relevant information? How did I/you solve and interpret the problem? How did I/you check the reasonableness of the answer? CFU 2 1 3 4 5

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. What did you learn today about the determining unit fraction of a whole? (Pair-Share) Use words from the word bank. A unit fraction is a number that represents one equal part of a whole. The numerator of a unit fraction is always 1. The denominator represents the number of total equal parts. Skill Closure Access Common Core Summary Closure Read the problem and identify what you are looking for. (underline) Determine the unit fraction. Write the numerator. Write the denominator. Hint: Count the number of total equal parts. Interpret the unit fraction Determine the unit fraction of a whole. 1 2 3 a b The unit fraction is. 1. A square has been divided into two equal parts. What is the unit fraction of the square? 2. A square has been divided into four equal parts. What is the unit fraction of the square? 2 1 12 The unit fraction is ___. 4 1 14 The unit fraction represents __ part of ___ equal parts. The unit fraction ___ represents __ part of ___ equal parts. 2 1 4 1 Explain why the unit fraction does not represent each part of the rectangle on the left. 1 3 1 4 numerator denominator Unit Fraction Word Bank unit fraction one equal part whole numerator denominator

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Independent Practice Read the problem and identify what you are looking for. (underline) Determine the unit fraction. Write the numerator. Write the denominator. Hint: Count the number of total equal parts. Interpret the unit fraction Determine the unit fraction of a whole. 1 2 3 a b A unit fraction is a number that represents one equal part of a whole. The numerator of a unit fraction is always 1. The denominator represents the number of total equal parts. 1 4 numerator denominator Unit Fraction 1. A triangle has been divided into two equal parts. What is the unit fraction of the triangle? 2. A figure has been divided into three equal parts. What is the unit fraction of the figure? The unit fraction is. 1 2 2 1 3 1 13 The unit fraction represents __ part of ___ equal parts. 2 1 3 1

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Independent Practice (continued) Read the problem and identify what you are looking for. (underline) Determine the unit fraction. Write the numerator. Write the denominator. Hint: Count the number of total equal parts. Interpret the unit fraction Determine the unit fraction of a whole. 1 2 3 a b A unit fraction is a number that represents one equal part of a whole. The numerator of a unit fraction is always 1. The denominator represents the number of total equal parts. 1 4 numerator denominator Unit Fraction 3. A tile has been divided into four equal parts. What is the unit fraction of one part of the tile? 4. A pie has been divided into five equal pieces. What is the unit fraction of one piece of the pie? The unit fraction is ___. 1 4 4 1 5 1 15 The unit fraction __ represents __ part of __ equal parts. 4 1 5 1

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Independent Practice (continued) 5. A piece of paper has been divided into six equal parts. What is the unit fraction of the paper? 6. A piece of paper has been divided into six equal parts. What is the unit fraction of the paper? The unit fraction is ___. 1 6 6 1 6 1 16 The unit fraction __ represents __ part of ___ equal parts. 6 1 6 1 1 4 numerator denominator Unit Fraction

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Periodic Review 1 Access Common Core 1. A sheet of metal has been cut into four equal pieces. What is the unit fraction of the sheet of metal? 2. A wooden desk is divided into two equal parts. What is the unit fraction of the wooden desk? The unit fraction is ___. The unit fraction __ represents __ part of ___ equal parts. 1 4 4 1 4 1 The unit fraction is ___. The unit fraction __ represents __ part of ___ equal parts. 1 2 2 1 2 1 1.Divide the pizza so that each piece represents a unit fraction of. Explain why each piece represents. 1 4 1 4 2. Divide the square so that each part represents a unit fraction of. Explain why each part represents. 1 3 1 3 Determine the unit fraction of a whole. Each piece is because it is 1 piece of 4 equal pieces of the pizza. 1 4 Each part is because it is 1 piece of 3 equal parts of the square. 1 3

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Periodic Review 2 Access Common Core 1. A shape is divided into equal parts. What is the unit fraction of the shape? 2. A triangle has been divided into equal parts. What is the unit fraction of the triangle? The unit fraction is ___. The unit fraction ___ represents __ part of __ equal parts. 1 8 8 1 8 1 The unit fraction is ___. The unit fraction ___ represents __ part of __ equal parts. 1 4 4 1 4 1 1. Tim, Hector, Julie, and Lenny are trying to divide a square into equal parts to play four-square at recess. What would be the unit fraction of each player’s part of the square? 2. Carol is dividing a pie into equal parts for her children to eat. If Carol has eight children, what would be the unit fraction of each slice of pie? Use pictures, math, or words to explain how you would find the answer. Determine the unit fraction of a whole.

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Periodic Review 3 1. A wooden desk is divided into equal parts. What is the unit fraction of the wooden desk? 2. A heart has been divided into equal parts. What is the unit fraction of the heart? The unit fraction is ___. The unit fraction ___ represents __ part of __ equal parts. 1 6 6 1 6 1 The unit fraction is ___. The unit fraction ___ represents __ part of __ equal parts. 1 2 2 1 2 1 Determine the unit fraction of a whole.

CCSS 3 rd Grade Number and Operations – Fractions 1.1 Determine the unit fraction of a whole. Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved. Access Common Core Determine if each figure is divided so that each part of the figure is the same unit fraction? Select Yes or No. O Yes O No a. b. c. d. O Yes O No a. b. c. d. O Yes O No 1. 2.

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