Lesson plan

Understand decimal computation by rounding decimals

teaches Common Core State Standards CCSS.Math.Content.5.NBT.A.4 http://corestandards.org/Math/Content/5/NBT/A/4
teaches Common Core State Standards CCSS.Math.Content.5.NBT.B.7 http://corestandards.org/Math/Content/5/NBT/B/7
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1

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Big Ideas: Rounding helps to develop an understanding of decimal computation. In grade four, students are expected to solve word problems with whole numbers and use strategies such as rounding to judge the reasonableness of their answers. As the student moves into grade five, the strategy of rounding is still required but additional layers of concrete models, drawings and an understanding of place value are required. This deep understanding prepares the students to understand how to judge the reasonableness for both whole numbers and decimals. Vocabulary: digit, estimate, place value, round, tenths, hundredths, thousandths Special Materials: Base ten blocks, number line, decimal grid