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2.2

2.2. Estimating Products by Rounding. Review. Decompose the factors to find the products 31 x 10 310 x 2 23 x 40 32 x 30. Objective. SWBAT estimate multi-digit products by: Rounding factors to a basic factor U sing place value patterns. Vocabulary. Factor Estimate Product

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2.2

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  1. 2.2 Estimating Products by Rounding

  2. Review • Decompose the factors to find the products • 31 x 10 • 310 x 2 • 23 x 40 • 32 x 30

  3. Objective • SWBAT estimate multi-digit products by: • Rounding factors to a basic factor • Using place value patterns

  4. Vocabulary • Factor • Estimate • Product • Rounding

  5. Problem A • Kevin practices guitar 1 hour a day for 2 years. Edgar practices the guitar2 hours a day more than Kevin. How many more minutes does Edgar practice the guitar than Kevin over the course of 2 years?

  6. Problem 1 • How many students do we have in class? • Do all the classes have exactly 26 students?

  7. Problems 2-4 • 456 x 42 • 4,560 x 42 • 4,560 x 420

  8. Problems 5-7 • 1,320 x 88 • 13,205 x 880 • 3,120 x 880 • 31,200 x 880

  9. Problem Set 2.2 • DO NOT WRITE ON THE PAPER!!! • Complete problem set 2.2 by copying down the problems and solving them. • Once you are done, compare your answers with the person next to you. • You have 15 minutes to complete these problems. • After 15 minutes is up, we share our answers.

  10. Exit Ticket • Round the factors and estimate the products. • A. 656 x 106 • B. 3,108 x 7,942 • C. 425 x 9,311 • D. 8,633 x 57,008

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