Unit 6

Geometry and Measurement Word Problems

 

Grade 3

Math

 

 

Description: Students solve one- and two-step word problems involving the four operations using standard units of grams, kilograms, and liters to improve fluency for concepts and skills initiated earlier in the year.  Students also describe, analyze, and compare properties of two- dimensional shapes.  Students will solve word problems involving money.

 

Louisiana Student Standards for Mathematics (LSSM)

Instructional Outcomes

 

Supporting Cluster Standards

3.MD.2

 

Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). (Excludes compound units such as cm^3 and finding the geometric volume of a container.) Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.

Represent and interpret data.

3.MD.4

 

Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch.  Show the data by making a line plot, where the horizontal scale is marked off in appropriate units—whole numbers, halves, or quarters.

Supporting Cluster: Measurement and Data

Geometric measurement:  recognize perimeter as an attribute of plane figures and distinguish between linear and area measures.

3.MD.8

 

Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.

Work With Money

3.MD.9

 

Solve word problems involving pennies, nickels, dimes, quarters, and bills greater than one dollar, using the dollar and cent symbols appropriately.

Supporting Cluster: Geometry

Reason with shapes and their attributes.

3.G.1

 

Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals).  Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

3.G.2

 

Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part is 1/4 of the area of the shape.

 

 

 

 

Enduring Understandings:

 

·         Geometry requires visualization, spatial reasoning, and geometric modeling to solve problems.

·         Objects have distinct attributes that can be measured.

·         Measurement describes the attributes of objects and events.

 

Essential Questions:

 

·         How do we use geometry to help us make sense of the world?

·         How does measurement keep our world organized?

·         What is a precise measurement?

·         Why do we measure and why do we need standardized units of measurement?

·         What types of problems are solved with measurement and geometry?