Unit 2, Lesson 21, Grade 3 icon
Unit 2, Lesson 21

Estimate sums and differences of measurements by rounding, and then solve mixed word problems

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In this lesson, students work in groups to measure the masses, lengths, and liquid volumes of various items. Then they estimate the sums and differences of their measurements, calculate the actual sums and differences, and make statements about the reasonableness of their answers using their estimated and actual values.

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