# 8. Use place value strategies to solve story problems (addition) (FP)

teaches Common Core State Standards CCSS.Math.Content.2.MD.C.8 http://corestandards.org/Math/Content/2/MD/C/8
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

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Lesson objective: Solve problems that require addition to put together amounts of money.

This lesson helps to build fluency with solving addition money story problems. Place value strategies (adding tens and ones, skip counting tens and ones on a number line) are used here because students can track the decomposition of the numbers and show how they are putting together the amounts of money. This work develops students' understanding that certain real-world money story problems require addition to put together amounts of money.

Students engage in Mathematical Practice 4 (Model with mathematics) as they show their work with representations to show they added to put together amounts of money. Students also engage in Mathematical Practice 6 (Attend to precision) as they use place value strategies to accurately solve real-world money story problems.

Key vocabulary:

• decompose
• number line
• put together
• tens and ones

Special materials needed:

• coins
• hundreds grids
• number lines
• scratch paper
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