Description
The focus of Topic C is comparison of decimal numbers (4.NF.7). To begin, students work with concrete representations of measurements. They see measurement of length on meter sticks, of mass using a scale, and of volume using graduated cylinders. In each case, students record the measurements on a place value chart and then compare them. They use their understanding of metric measurement and decimals to answer questions, such as, “Which is greater? Less? Which is longer? Shorter? Which is heavier? Lighter?” Next, students use area models and number lines to compare decimal numbers and use the <, >, and = symbols to record their comparisons. Students go on to arrange mixed groups of decimal fractions in unit, fraction, and decimal forms in order from greatest to least, or least to greatest.
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Credits
From EngageNY.org of the New York State Education Department. Grade 4 Mathematics Module 6, Topic C Overview.
Available from engageny.org/resource/grade-4-mathematics-module-6-topic-c-overview; accessed 2015-05-29.
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