## Problem Solving with Operations

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__Standards__:

**Main Standard:**

**4.OA.3**Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

**Supporting Standards:**

4.NBT.4, 4.NBT.5, 4.NBT.6

Students should be able to...

The focus in this standard is to have students use and discuss various strategies.

Example:

- Explain how you solved your problem - include your strategy, how you determined which operation to use, how you made sure your answer was reasonable, and how you made sure your answer was accurate.
- Explain why estimating is a good strategy to use when solving multi-step problems.

The focus in this standard is to have students use and discuss various strategies.

- The standard refers to estimation strategies, including using compatible numbers (numbers that sum to 10 or 100) or rounding.
- Students will have many opportunities solving multistep story problems using all four operations.
- By reasoning repeatedly about the connection between math drawings and written numerical work, students can come to see multiplication and division algorithms as abbreviations or summaries of their reasoning about quantities.

Example:

*Ken is having a pizza party with 24 friends. He is expecting everyone to eat two pieces of pizza, one cookie, and to have one drink. Pizzas have 8 slices each. The cookies come in packages of 4, and drinks are sold in packs of 6. How many of each should Ken buy?*