Creative problem solving investigation. Students can work alone, in pairs, or small groups to generate as many possible solutions to the problem. They then come up and share their solutions, how they got them, and why they work.
4.NBT.B.4 - Fluently add and subtract multi-digit whole numbers using the standard algorithm.
NV 2.3.1a - Recognize, describe, and create patterns using objects and numbers found in tables, number charts, and charts.
NV 1.5.8 - Generate and solve addition, subtraction, multiplication, and division problems using whole numbers and decimals in practical situations.
NV 2.5.2.b - Solve equations with whole numbers using a variety of methods, including inverse operations, mental math, and guess and check.
2.OA.A.1 - Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. (See Glossary, Table 1.)