# 1.5 Expanded Form and Scientific Notation (and Mid-Chapter Review)

This is the sixth section of Chapter 1: Number Relationships.

## Introduction to Expanded Form and Scientific Notation

The *Learning Goal* for this section is to: Develop a strong understanding of expanded form and scientific notation, and to be able to compare large numbers in different formats.

There are two ways that students can tell that they are being successful:

- They can convert confidently between expanded form, standard form and scientific notation; and
- They can compare numbers using multiples of 10

In the introduction, we defined *Scientific Notation* and *Expanded Form*, and gave examples of each. There were a number of additional examples on the board, but they didn't make it into the notes.

## Activity: A Lifetime of Heartbeats

In this activity, students needed to compare the total number of heartbeats in the lifetime of an old man and a parrot. The objective was to show students how exponential notation can come in useful.

## Section 1.6 Support Questions

The support questions for this section were on p. 22-23, #4, 5, 6, 7, 8, 9, 10, 11, 12, 13 (choose any 6).

## Mid-Chapter Review Support Questions

The support questions for the Mid-Chapter Review were on p. 24-25, #4, 5, 6, 7, 8, 9, 10, 11 (choose any 5).