Thursday, July 1, 2010

Math problems of the week: 6th grade Connected Math vs. Singapore Math

I. Final percent problem in Bits and Pieces III: Computing with Decimals and Percents, p. 78:


Explain the general procedures you use to answer these questions about percents. Give specific numerical examples.

a. How do you find the percent equivalent to a given decimal?
b. How do you find what percent one number is of another?
c. How do you find a given percent of a number?

II. Final percent problem in Singapore Math Primary Mathematics 6B, p. 96:

Bridget, Laura and Reagan shared a sum of money. Bridget's share was 40% of the money. Reagan's share was $4 more than Laura's. Laura's share was $16. How much money did they share altogether?

III. Extra Credit:

Which problem involves higher level thinking?

4 comments:

gasstationwithoutpumps said...

I think you've introduced a typo into the Singapore problem. Check the wording carefully.

Katharine Beals said...

Thanks, gswp! Fixed!

Who are we?-- said...

wheww...No idea,,but surely you would love to check out this post of mine...

http://accessbizit.blogspot.com/2010/07/twisted-tale-of-math-problems.html

its on about the solution of the second problem...

1crosbycat said...

I get so mad reading the first problem - any that ask to "Explain" instead of giving the kids actual problems to solve.

The 6th grade Singapore problem is like our 3rd grade enVisionMATH problems, where they call it "Act it out and use reasoning", and I found it difficult to find a method to solve that I could explain to my son, without using a little algebra.