• Chapter 1:  
    Multiplication Thinking
  •  

    Overview 

    Unit 1 begins the year with a study of multiplication and division, focusing in particular on models, strategies and multiplicative comparisons. In Module 1, students use open number lines, arrays, and ratio tables. They also solve multiplication and division story problems and participate in their first math forum. In Module 2, they use the area model to investigate factors and multiples and prime and composite numbers. They also review strategies for finding single-digit multiplication facts. Module 3 has them working with factors and products as well as multiplicative comparisons and equations. Module 4 extends the idea of multiplicative comparison into the arena of measurement, as students develop deeper understandings of the relative sizes of metric units for length, mass, and liquid volume. 

    Skills Across the Grade Levels

    The table below shows the major skills and concepts addressed in Unit 1. It is meant to provide a quick snapshot of the expectations for students’ learning during this unit, as well as information about how these skills are addressed in Bridges Grade 3, elsewhere in Grade 4 including Number Corner (NC), and also in Grade 5. 

    Major Skills/Concepts Addressed Gr. 3 Unit 1 Gr. 4 Elsewhere Gr. 5 

    3.OA.1 Interpret products of whole numbers.

    3.OA.3 Solve multiplication story problems with products to 100 involving situations of equal groups. 

    3.OA.4 Solve for the unknown in a multiplication equation involving 3 whole numbers. 

    3.OA.5 Multiply using the commutative and distributive properties. 

    3.OA.7 Fluently multiply with products to 100 using strategies.

     3.MD.7a Demonstrate that the area of a rectangle with whole-number side lengths can be found by multiplying the side lengths. 

    3.MD.7b Represent the product of two numbers as the area of a rectangle with side lengths equal to those two numbers. 

    3.MD.7c Use the area model for multiplication to illustrate the distributive property. 

    3.MD.7d Find the area of a figure that can be decomposed into non-overlapping rectangles. 

    4.OA.1 Write a multiplication equation to represent a verbal statement of multiplicative comparison. 

    4.OA.2 Solve story problems involving a multiplicative comparison using multiplication or division. 

    4.OA.4 Find all factor pairs for a whole number between 1 and 100. 

    4.OA.4 Demonstrate an understanding that a whole number is a multiple of each of its factors. 

    4.OA.4 Determine whether a whole number between 1 and 100 is prime or composite.

    4.MD.1 Identify the relative sizes of centimeters, meters, and kilometers; grams and kilograms; ounces and pounds; milliliters and liters; seconds minutes, and hours. 

    4.MD.1 Express a measurement in a larger unit in terms of a smaller unit within the same system of measurement

     
    *Retrieved on July 21, 2021 from http://bridges.mathlearningcenter.org/