# Clip 9/29: Standard 1: Making Sense and Perseverance Using Multiplication & Division Part 1A

## Overview

*Mathematically proficient students start by explaining to themselves the meaning of a problem and looking for entry points to its solution.... They can understand the approaches of others to solving complex problems and identify correspondences between different approaches.*

In this clip, Mia Buljan works with her students on a number talk, using a mental math approach to multiplying a two-digit number and a one-digit number. She invites her students to share their approaches to the problem, and probes them with questions to identify rationales for their reasoning.

**See this video in the context of an entire lesson.**

**(Parts A - C )**