Chapter 8: Multiply Fractions by Whole Numbers
In Chapter 8 we will:
Vocabulary: fraction – a number that names part of a while or part of a group factor - a number that us multiplied by another number to find a product multiple – the product of two counting numbers (ex. multiples of 3 are: 3,6,9,12,15,18,21...) product – the answer to a multiplication problem unit fraction – a fraction that has a numerator of one Identity Property of Multiplication - the property that states the product of any number and 1 is that number (ex. 6x1=6, 327x1=327) |
Chapter 8 videos:
Lesson 8.1 Multiples of Unit Fractions (CC.4.NF.4b)* Lesson 8.2 Multiples of Fractions (CC.4.NF.4b)^ Lesson 8.3 Multiply a Fraction by a Whole Number Using Models (CC.4.NF.4b)* Lesson 8.4 Multiply a Fraction of Mixed Number by a Whole Number (CC.4.NF.4c)^ Lesson 8.5 Problem Solving: Comparison Problems with Fractions (CC.4.NF.4c)* ^ - created by Alden Jack - North Park Elementary * - created by Holly Stuart - North Park Elementary Chapter 8 Standards: Number and Operations - Fractions
Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers. (CC.4.NF.3) a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole. b. Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8; 3/8 = 1/8 + 2/8; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8. c. Add and subtract mixed numbers with like denominators, e.g., be replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction. d. Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem. |