# ALEX Classroom Resources

ALEX Classroom Resources
Subject: Mathematics (5), Mathematics (5)
Title: Grade 5 Mathematics Module 2, Topic A: Mental Strategies for Multi-Digit Whole Number Multiplication
Description:

Module 2, Topic A begins a sequential study of multiplication that culminates in Topic D. In order to link prior learning from Grade 4 Module 1 and Grade 5 Module 1 and to set the stage for solidifying the standard multiplication algorithm, students begin at the concretepictorial level. They use place value disks to model multi-digit multiplication of place value units, for example, 42 × 10, 42 × 100, 42 × 1,000, leading quickly to problems such as 42 × 30, 42 × 300, and 42 × 3,000 (5.NBT.1, 5.NBT.2). Students then round factors in Lesson 2 and discuss the reasonableness of their products. Throughout Topic A, students evaluate and write simple expressions to record their calculations using the associative property and parentheses to record the relevant order of calculations (5.OA.1).

Subject: Mathematics (5), Mathematics (5)
Title: Grade 5 Mathematics Module 2, Topic B: The Standard Algorithm for Multi-Digit Whole Number Multiplication