1.1 Additive inverses (Zero pairs) | Zero Pairs and Addition | Mastering Directed Number | Products | Complete Mathematics

1.1 Additive inverses (Zero pairs)

1.1 Additive inverses (Zero pairs)

Mastering Directed Number

Buy nowLearn more

Introduction

1.0 Introduction

Zero Pairs and Addition

1.1 Additive inverses (Zero pairs)

1.2 Field Axioms for Addition

1.3 Zero Pairs — Random Scatter

1.3b TASK: Zero Pairs — Random Scatter

1.4 Modeling additions — A consistent approach

1.5 TASK: Addition — Some to try

1.6 Moving to efficient methods

1.6b TASK — Moving to efficient methods

1.7 Generalising addition

1.7b TASK — Generalising addition

1.8a TASK: Zero Pairs — Behaving Mathematically

1.8b TASK: Zero Pairs — Behaving Mathematically

Subtraction with Directed number

2.1 The difference between minus and negative

2.2 Subtraction as shorthand notation

2.2b TASK: Subtraction as a shorthand notation

2.3 A scaffold for subtraction

2.3b A scaffold for subtraction

2.4 TASK: Subtraction — Some to try

2.5 Variation — Match up the calculations

2.5b TASK: Variation — Match up the calculations

2.6 TASK: Equivalent Subtractions and Additions

2.7 TASK: Efficient mental methods

2.8 TASK: Generalising subtraction

2.9 TASK: The two 2's challenge

2.10 A flawed model for subtraction

2.10b A flawed model for subtraction

Summary

3.0 Summary

3.1 Directed Number — All Slides1