# Comparing Numerical Expressions.   Round the factors to estimate the products  421 x 18  323 x 21  1,950 x 42  2,480 x 27 Review.

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Comparing Numerical Expressions

  Round the factors to estimate the products  421 x 18  323 x 21  1,950 x 42  2,480 x 27 Review

  SWBAT write and interpret numerical expressions by:  Comparing expressions  Using a visual model Objective

  Expression  Equation  Sum  Product  Difference  Quotient Vocabulary

 Please Excuse My Dear Aunt Sally (PEMDAS)

  Anthony is 11 years old. His mother, Tiffany, is 2 years more than 3 times Anthony’s age. How old is Tiffany? Review Problem

  Translate words into mathematical phrases and use a tape diagram  3 times the sum of 26 and 4;  The sum of 2 twelves and 4 threes Problem 1-2

  6 times the sum of 26 and 4  The difference of 86 – 45 times 5 Now let’s try together….

  Translate mathematical phrases into words  8 × (43 – 13)  (20 × 3) + (5 × 3) Problems 3-4

  7 x (24 + 16)  (15 x 2) – (3 x2) Now let’s try together….

  Compare the expressions using, or =.  9 x 13 and 8 thirteens Problems 5

  The sum of 10 and 9 doubled and  (2 x 10) + (2 x 9) Now let’s try together…..

  DO NOT WRITE ON PAPER!!!  Group A: complete number 3 first  Group B: complete number 1 first  Group C: complete number 2 first  Group D: you will be working with the teacher  You have 10 minutes to complete the problems. If you finish early start on your journal entry. Problem Set 2.3

  Count off by threes’.  Once you move to your area, share how you have got your answers with everyone in the group.  You will 10 minutes to share.  Once 10 minutes is up, a few students from each group with share what they learned from another student. You must share one of the problems you completed. Group Work

  1. Draw a model then write the numerical expressions.  A. The difference between 8 forty-sevens and 7 forty- sevens  B. 6 times the sum of 12 and 8  2. Compare the two expressions using >, <, or =.  A. 62 x (70 + 8) (70 + 8) x 26 Exit Ticket

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