In this lesson, students round numbers to different place values in context. In addition to rounding numbers, students determine the possible value of a number, given the numbers it rounds to. When students interpret the speeds and times as they might be rounded to different places and how this would influence their order they reason abstractly and quantitatively (MP2).
While not required, number lines can be helpful throughout this lesson to visualize which whole number, tenth, or hundredth is closest to a given quantity. Locating all the numbers on the same number line accurately will be challenging, but students can locate them individually to help round or they can estimate the locations in order to compare decimals.
- Round decimals to different place values and order them.
- Let's round and order decimals to solve problems.
|Activity 1||20 min|
|Activity 2||15 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- Tic Tac Round (3–5), Stage 3: Decimals (Addressing)
- Greatest of Them All (1–5), Stage 4: Decimals (Addressing)
- Jump the Line (2–5), Stage 2: Add and Subtract Tenths and Hundredths (Supporting)
Print Formatted Materials
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