In this lesson, students solve problems about weight in two Information Gap activities. They interpret descriptions of situations involving all four operations where one or more quantities are missing. Students determine the information that they need to answer the questions and then reason about the solutions.
Representation
None
Learning Goals
Determine the information needed to solve measurement problems involving addition, subtraction, multiplication, or division. Ask (orally) questions to elicit that information.
Student-Facing Goal
Let’s find out what information is needed to solve problems about measurements at the fair.
In this lesson, students had a chance to revisit subtraction that required decomposing hundreds into tens and tens into ones. What strategies are most students choosing for this work?
Standards Alignment
Building On
Addressing
3.MD.A.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 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.Excludes multiplicative comparison problems (problems involving notions of “times as much”); see Glossary, Table 2.