Whole Numbers:

Key Words:
- Expanded form
- Standard form
- Front-end rounding
- Compatible numbers
​- Compensations

Lesson 1: Numbers to 100 000

Lesson 2: Exploring One Million

Lesson 3: Representing Numbers

Lesson 4: Estimating Sums

Lesson 5: Using Benchmarks to Estimate

Lesson 6: Estimating Differences

Lesson 7: Using Estimating to Check Answers