Problem 2

0 views

Published on

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
0
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Problem 2

  1. 1. Rob Schupbach Problem #2CRIN E07: Elementary Math Curriculum and InstructionDr. Margie MasonSeptember 17, 2011Topic: Computation and Estimation: Factors and Mutliples—Grade 4 (SOL 4.4)Expected Heuristics: Choose an operation; Make table; Guess & checkTea with Mr. Tumnus—The Lion, The Witch, and The Wardrobe by C.S. LewisMr. Tumnus told Lucy about a midnight party of fauns and Dryads in the forest ofNarnia. 35 fauns came to the party. There were 3 times as many Dryads as fauns.How many creatures were at the party?If the whole group split equally into 5 large circles for dancing, how many were ineach circle?Answer:140 creatures at the party and there were 28 dancers in each circle.Complete Solutions:For students who are not used to bar diagrams, the natural tendency is to multiply3 x 35 = 105 creatures at the party. A quickly sketched diagram will show theirerror:There are four units in all, and 4 x 35 = 140. So 140 creatures were at the party.The second part of the problem is straight-forward. A diagram may not be needed,but here it is anyway:140 ÷ 5 = 28. There were 28 dancers in each circle.Let’s Play Math. (2011). Retrieved September 17, 2011, from http://letsplaymath.net/ 1

×