Review of Basic Fraction Concepts

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1 Review of asic Fraction Concepts Objective To review fractions as parts of a whole (ONE), fractions on number lines, and uses of fractions. epresentations etoolkit lgorithms Practice EM Facts Workshop Game Family Letters ssessment Management Common Core State Standards Curriculum Focal Points Interactive Teacher s Lesson Guide Teaching the Lesson Ongoing Learning & Practice Differentiation Options Key Concepts and Skills Identify fractions as equal parts of a whole or the ONE and solve problems involving fractional parts of regions. [Number and Numeration Goal ] Identify equivalent fractions and mixed numbers. [Number and Numeration Goal ] Identify a triangle,, trapezoid, and rhombus. [Geometry Goal ] Find fractions and mixed numbers on number lines. [Patterns, Functions, and lgebra Goal ] Key ctivities Students review the meaning and uses of fractions. They draw various pattern-block shapes and color a fractional part of each shape. Ongoing ssessment: Recognizing Student chievement Use journal page. [Number and Numeration Goal ] Key Vocabulary whole (or ONE or unit) mixed number denominator numerator whole box Playing Product Pile-Up Student Reference ook, p. 9 per group: each of number cards (from Everything Math Decks, if available) Students maintain automaticity with multiplication facts. Math oxes 7 Math Journal, p. Students practice and maintain skills through Math ox problems. Study Link 7 Math Masters, p. Students practice and maintain skills through Study Link activities. REDINESS Creating a Number-Line Model for Fractions Math Masters, pp. and scissors tape Students locate fractions on a number line. ENRICHMENT Constructing an Equilateral Triangle Math Masters, p. compass straightedge scissors crayons or colored pencils tape Students construct an equilateral triangle using a compass and straightedge. ENRICHMENT Naming Fractional Parts of a Region Geometry Template or pattern blocks crayons or colored pencils Students make designs with pattern blocks and label each block as a fraction of the design. ELL SUPPORT uilding a Math Word ank Differentiation Handbook, p. Students add the terms numerator and denominator to their Math Word anks. Materials Math Journal, pp. 7 Student Reference ook, p. pattern blocks (optional) straightedge calculator slate dvance Preparation Teacher s Reference Manual, Grades pp. 7,, 7 Unit 7 Fractions and Their Uses; Chance and Probability

2 Getting Started Mental Math and Reflexes Have students name the next three multiples in a sequence. Suggestions:,,,...,,,,,...,,,,,...,,,,,... 7,, 9,,,...,, 7, 9,,...,,,,,...,,,,,...,, 9,, 7,...,, Math Message List three ways that fractions are used outside of your math class. Teaching the Lesson Math Message Follow-Up (Student Reference ook, p. ) SMLL-GROUP Interactive whiteboard-ready epresentations are available at to help you teach the lesson. sk students to share their examples. Then have students read Student Reference ook, page to find other uses of fractions. Tell students that in this lesson they will review fractions as parts of wholes, measures, and counts. Links to the Future The use of fractions in rate and ratio comparisons is addressed in Unit of Fourth Grade Everyday Mathematics. Reviewing Fraction Ideas and Notation WHOLE-CLSS Write several fractions on the board, and remind students of the following: fraction is always a fraction of something for example, _ of an orange or _ of a mile. This something is called the whole, or ONE; for measures and counts, it is the unit. The parts into which the whole is divided must be the same size they must be fair shares. The common fraction notation is a_, but fractions can also be b written with a slash: a/b. Numbers such as _ and _ are called mixed numbers. The number below the fraction bar is called the denominator. It names the number of equal parts into which the whole is divided. ELL Here are some other examples of uses of fractions: Study the recipe shown at the right. Many of the amounts listed in the recipe include fractions. movie critic gave the film Finding Nemo a rating of stars (on a scale of to stars). This spinner has of the circle colored red, colored blue, and colored green. If we spin the spinner many times, it will land on red about of the time. It will land on blue about of the time. nd it will land on green about of the time. The probability that the spinner will land on a color that is not green is 7. If a map includes a scale, you can use the scale to estimate real-world distances. The scale on the map shown here is given as :,. This means that every distance on the map is, of the real-world distance. centimeter distance on the map stands for a realworld distance of, centimeters ( meters). Fractions are often used to describe clothing sizes. For example, women s shoes come in sizes,,,, and so on, up to. Part of a size chart for women s shoes is shown at the right. It gives the recommended shoe size for women whose feet are between 9 and inches long. Student Reference ook, p. Fractions Size Chart for Women s Shoes Heel-to-toe length (in.) Size to 9 9 to 9 9 to to to 9 9 to 9 9 to 9 Lesson 7 7

3 Date Divide each shape into equal parts. Color a fraction of the parts. Write the name of the whole in the whole box Fraction Review Divide the into equal parts. Color _ of the. rhombus Divide the rhombus into equal parts. Color _ of the rhombus. trapezoid Divide the trapezoid into equal parts. Color _ of the trapezoid. Divide the into equal parts. Color _ of the. Math Journal, p. -_EMCS_S_MJ_G_U7_7.indd Sample answers: /7/ : M The number above the fraction bar is called the numerator. It names the number of parts under consideration. For example, if Sue ate _ of a pizza, the pizza is the whole. The fraction _ tells us that the pizza was divided into three equal parts, and Sue ate two of them. To support English language learners, label the numerator and denominator of each fraction written on the board. Identifying Fractional Parts of Pattern-lock Shapes (Math Journal, pp. and ) Students use a straightedge to divide each shape on journal pages and into a specified number of equal parts and color a fraction of the shape. PRTNER Do Problem with the class. Remind students that the whole (or ONE) is the. Call students attention to the whole box, which is used to write the name of the whole. s they work on Problems 7, students record the name of each item in the whole box. Have students complete Problem independently. Date. 7 djusting the ctivity Fraction Review continued ELL Encourage students to model the problems with pattern blocks. UDITORY KINESTHETIC TCTILE VISUL NOTE You might ask students to identify a fraction that could describe the colored parts of the shapes in Problem on journal page. _ Repeat this procedure for Problem 7. _ The term improper fraction is sometimes used to describe a fraction with a numerator that is greater than or equal to its denominator. When students have finished, explain that it is sometimes useful to write fractions and mixed numbers as sums. This is called decomposing a fraction or mixed number. For example, _ can be decomposed into the sum _ + _ or the sum _ + _. sk students to decompose each fraction or mixed number in Problems,, and 7 into a sum of fractions. Sample answers: Problem : _ + _ + _ + _ + _ = _ ; Problem : _ + _ = _ ; Problem 7: _ + _ + _ = _ to decompose. Pose additional fractions for students. 7. Divide the into equal parts. Color _ of the. Divide each into thirds. Color _ s. rhombus Divide each rhombus into equal parts. Color _ rhombuses. Ongoing ssessment: Recognizing Student chievement Journal page Problem Use journal page, Problem to assess students understanding of fractions as equal parts of a whole. Students are making adequate progress if their responses note that Grace did not divide the into equal parts. Some students responses may include correct ways to shade _ of the. [Number and Numeration Goal ]. Grace was asked to color _ of a. This is what she did. What is wrong? Sample answer: She did not divide the into equal parts. Math Journal, p. -_EMCS_S_MJ_G_U7_7.indd /7/ : M 7 Unit 7 Fractions and Their Uses; Chance and Probability

4 Identifying Fractional Parts of Number Lines (Math Journal, p. 7) PRTNER PROLEM SOLVING In Problems 9 on journal page 7, students write fractions and mixed numbers for points on number lines. Number-line problems reinforce the concept that fractions and decimals can be used to name numbers between whole numbers. Date 7 Fraction Review continued Fill in the missing fractions and mixed numbers on the number lines Entering Fractions and Mixed Numbers on a Calculator (Math Journal, p. 7) WHOLE-CLSS Lead students through the appropriate steps to enter fractions and mixed numbers on their calculators. To enter _ : On a TI-, press n d. On a Casio fx-, press. To enter 7_ : On a TI-, press Unit 7 n d. On a Casio fx-, press 7. Have students practice using their calculators to enter the fractions and mixed numbers on journal page 7... Try This. Enter the fractions above on your calculator. Record the keystrokes you used to enter and. Sample answer: On my TI-, I pressed n d for. To enter, I pressed Unit n d. On my Casio fx-, I pressed for and for. Math Journal, p. 7 djusting the ctivity ELL Have students refer to their Fraction Number- Line Poster. See the optional Readiness activity in Part. UDITORY KINESTHETIC TCTILE VISUL Ongoing Learning & Practice Date Playing Product Pile-Up (Student Reference ook, p. 9) SMLL-GROUP 7 Math oxes obtuse. What fraction of the clock face is shaded?. POL is an (acute or, or obtuse) angle. P Students play Product Pile-Up to maintain automaticity with multiplication facts. See Lesson - for additonal information. O The measure of POL is. L 9 Math oxes 7 (Math Journal, p. ) Mixed Practice Math oxes in this lesson are paired with Math oxes in Lesson 7-. The skill in Problem previews Unit content. Writing/Reasoning Have students write a response to the following: How did you determine whether the angle in Problem was obtuse or acute? Sample answer: The measure of angle POL is greater than 9 degrees, so it is obtuse.. Multiply. Use a paper-and-pencil algorithm., a. What city in Region is located near N latitude and E longitude? Cairo b. In which country is the city located? Egypt c. On which continent is the city located? frica Math Journal, p.. The five largest birds that are able to fly have the following weights:.,.,.9,., and. kilograms. a. What is the median weight? kg b. What is the mode? kg c. What is the range? kg d. What is the mean? kg 7 7. a. Measure and record the length of each side of the rectangle. in. in in. b. What is the total distance around the rectangle called? Circle one. perimeter area in. Lesson 7 7

5 Study Link Master Name Date STUDY LINK 7 Fractions. Divide the circle into equal parts. Color of the circle. Study Link 7 (Math Masters, p. ) Rule circle. Divide the rectangle into equal parts. Shade of the rectangle. Home Connection Students identify fractional parts of shapes and number lines. Rule rectangle. Divide each square into fourths. Color of the squares. Rule square Differentiation Options Fill in the missing fractions and mixed numbers on the number lines Practice,,. 7 7.,9,.,9 9.,97,97,7 7,97 Math Masters, p. REDINESS Creating a Number-Line Model for Fractions (Math Masters, pp. and ) SMLL-GROUP Min To provide experience locating fractions on a number line, have students create a Fraction Number-Line Poster. Students cut out the fraction strips on Math Masters, page. The top strip shows a number line from to. It represents the whole, or the ONE. Have students tape it exactly over the strip on Math Masters, page. sk students to fold the Halves strip in half, make a mark where the crease meets the number line, and label it _. Have students tape it to the strip on Math Masters, page. Halves Name Date 7 Fraction Strips Cut along the dashed lines. Teaching Master Halves Fourths Eighths Number-line model for halves sk students to fold, label, and tape the remaining strips. Have them choose how to fold and label the last strip. For each strip, have students begin with their finger on the and count each fractional part until they count to one. This way, they count the number of intervals, not the number of marks. Discuss how the number-line model is different from the region and set models for fractions. sk: Can you think of places in the everyday world where fraction number lines are found? Sample answers: Rulers and measuring cups Thirds 7 NOTE The Fraction Number-Line Poster is also used in the Readiness activity in Lesson 7-7. Sixths Math Masters, p. 7 Unit 7 Fractions and Their Uses; Chance and Probability

6 ENRICHMENT Constructing an Equilateral Triangle (Math Masters, p. ) Min 7 Teaching Master Name Date Fraction Number-Line Poster Halves To apply students understanding of fractions as equal parts of a whole, have them construct an equilateral triangle using a compass and straightedge. They cut out the triangle and divide it into six equal parts. Possible strategy: Put two vertices together, and fold the triangle in half. Unfold it. Repeat the process twice, using a different pair of vertices each time. Fourths Eighths Thirds Sixths ENRICHMENT Naming Fractional Parts of a Region Min Math Masters, p. rt Link To apply students understanding of the whole, have them use pattern blocks (, trapezoid, wide rhombus, and triangle) or the Geometry Template to draw and color a design (whole). sk students to write the fraction of the design each shape represents. Students should compare their designs and note that the amount represented by a fraction depends on the whole, or the ONE. For example: Teaching Master Name Date 7 Constructing an Equilateral Triangle n equilateral triangle is a triangle in which all sides are the same length. Here is one way to construct an equilateral triangle using a compass and straightedge. Step : Draw line segment. ELL SUPPORT uilding a Math Word ank (Differentiation Handbook, p. ) SMLL-GROUP Min Step : Place the anchor of the compass on and the pencil on. Without changing the compass opening, make an arc above the line segment. Step : Place the anchor on. Keeping the same compass opening, make a second arc that crosses the first arc. Label the point where the two arcs cross as C. C To provide language support for fractions, have students use the Word ank Template found on Differentiation Handbook, page. sk students to write the terms numerator and denominator, draw pictures relating to each term, and write other related words. See the Differentiation Handbook for more information. Step : Draw line segments C and C. C Use your compass and straightedge to construct a very large equilateral triangle on a separate sheet of paper. Cut out your triangle. Divide it into equal parts. Color of it. Tape your triangle on the back of this sheet. Math Masters, p. Lesson 7 7

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