In this episode, we discuss the meaning of the equal sign, why multiplying by decimals less than one makes numbers smaller, and rounding vs. estimating.

Open Middle Kindergarten Equality Problem

Open Middle First Grade Equality Problem

Open Middle 2 Digit Equality Problem

Open Middle Recording Sheet

Broken Calculator

Broken Calculator in Episode 6

Powers of Ten Video

Decimal Multiplication Number String

Number Strings Website

Blog Post about Inaba Puzzles