Lesson 31: Standard mETHOD & rEGROUPING

Lesson 31 Learning Objective:

Multiply two-digit numbers by one-digit numbers using the standard algorithm (with and without regrouping ones)

Math Talk:

See Math Talk image below

Math Play:

Polypad: Play with base 10 blocks to visualize multiplication

Learn:

Lesson 31 Learning Guide

From Jump Math:

NS4-25, NS4-26

Practice:

Jump Math 4.1:
Pages 124-125

Reflect
Reflect in your math journal. Draw, create or write to share your thinking. See Lesson 29 guide for more reflection questions, real life anchoring ideas, playful explorations and creative invitations.

How does your understanding shift when you stop thinking about ‘just carrying the number’ and start imagining why?
What actually happens when you ‘carry’ the ones to the tens spot?
You solved 34 × 2 and didn’t need to regroup. But when you tried 34 × 3, you did. Why do you think that happened?
Describe how you multiply 46 x 3 and how the steps make sense to you
Create a visual representation of regrouping

Math Talk:
What Math Lives Here?

Have a conversation about this image. Be curious. Be creative. Can you see in different ways?

How do you see multiplication?

What is the same about each of these multiplication problems? What is different? What makes most sense to you?

Designed with Polypad by LM