• ### B.1. Word Problem Models

3. #### B.1.1. Distributing Candy

1. B.1.1.1. Beginning Distributions
2. B.1.1.2. The Distribution Formula
3. B.1.1.3. “Disguised” Distribution Problems
4. B.1.1.4. Harder Distribution Problems
5. B.1.1.5. Mixed Practice with Distributions
6. B.1.1.6. Mixed Practice Continued
4. #### B.1.2. Age Word Problems

1. B.1.2.1. Simple Age Problems
2. B.1.2.2. Sum of Ages
3. B.1.2.3. Solving Ages using Charts
4. B.1.2.4. Mixed Practice with Age Problems
5. #### B.1.3. Rate in Olympiad Level

1. B.1.3.O. Overview
2. B.1.3.1. Constant Rates
3. B.1.3.2. Filling Buses and Cars
4. B.1.3.3. Exchanging Bottles
5. B.1.3.4. Unexpected Counting at Constant Rates
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• ### B.2. Balances and Equations

3. #### B.2.1. Simultaneous Equations

1. B.2.1.1. Simultaneous Equations
2. B.2.1.2. Harder Simultaneous Equations
3. B.2.1.3. Simultaneous Equations: Tricky
4. B.2.1.4. Beginning Word Problems
5. B.2.1.5. Trickier Word Problems
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• ### B.3. New Operations

3. #### B.3.1. New Operations I

1. B.3.1.1. Simple Explicit Definitions
2. B.3.1.2. More Complicated Explicit Definitions
3. B.3.1.3. Implicit Definitions
4. B.3.1.4. Mixed Practice with Definitions
4. #### B.3.2. New Operations II

1. B.3.2.1. Incomplete Definitions
2. B.3.2.2. Conditional Definitions
3. B.3.2.3. Challenging Problems
4. B.3.2.4. Mixed Practice with New Operations
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• ### B.4. Algebraic Reasoning I

3. #### B.4.1. Substitution

1. B.4.1.1. Balances
2. B.4.1.2. Substitution with Balances
3. B.4.1.3. Harder Substitution Problems
4. B.4.1.4. Word Problems 1
5. B.4.1.5. Word Problems 2
6. B.4.1.6. Word Problems 3
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