Objective: Represent mixed numbers with units of tens, ones, and tenths with number disks, on the number line, and in expanded form.
In Lesson 3, students work with place value disks and the number line to represent and identify decimal numbers with tenths as a unit. To explore the place value of each unit in a decimal number with tenths, students use number disks to rename groups of 10 tenths as ones. Next, students learn to record the value of each digit of a mixed number in fraction expanded form, followed by decimal expanded form. Finally, students model the value of decimal fractions within a mixed number by plotting decimal numbers on the number line.
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