**Click here to view the Spanish version:** https://youtu.be/cLgutfoQrNk

**In This Unit of Study…**

Students will solve multistep real-world problems involving any combination of the four operations with whole numbers, including problems involving money that use decimal notation, while also writing an equation involving any of the four operations to determine the unknown whole number. They will explore multiplication and division of multi-digit numbers with decimals to the hundredths by using estimation, rounding, and place value. The estimations of solutions will aid students in checking the reasonableness of their answers. Students will then represent and solve multistep problems involving addition, subtraction, multiplication, and/or division, as well as an unknown variable represented by a letter. Once problems are solved, students will know whether their answers are reasonable by comparing answers to their original estimations of solutions. In addition, students will find the perimeter and area of a rectangle with fractional or decimal side lengths by using visual models and formulas.

**B.E.S.T. Benchmarks:**

**MA.5.AR.1.1**Solve multi-step real-world problems involving any combination of the four operations with whole numbers, including problems in which remainders must be interpreted within the context.**MA.5.AR.2.4**Given a mathematical or real-world context, write an equation involving any of the four operations to determine the unknown whole number with the unknown in any position.**MA.5.M.2.1**Solve multi-step real-world problems involving money using decimal notation.**MA.5.NSO.2.4**Explore the multiplication and division of multi-digit numbers with decimals to the hundredths using estimation, rounding and place value.**MA.5.GR.2.1**Find the perimeter and area of a rectangle with fractional or decimal side lengths using visual models and formulas.

**Key Concepts:**

- I can represent and solve real-world problems.
- I can describe the meaning of a remainder within a real-world problem.
- I can write an equation with any of the four operations and an unknown.
- I can solve real-world multi-step problems involving money using decimal notation.
- I can use estimation to determine the reasonableness of an answer.
- I can find the perimeter of a rectangle with decimal side lengths using models and formulas.
- I can find the area of a rectangle with decimal side lengths using models and formulas.