Friday, January 11, 2013

Math problems of the week: 5th grade Investigations vs. Singapore Math

I. The most challenging division caculations in the 5th grade Investigations Student Activity Book (from the second-to-last chapter in the book) [click to enlarge]:

II. The most challenging division calcuations in the 5th grade Singapore Math Primary Mathematics Workbook (from the second chapter in the book) [click to enlarge]:

III. Extra Credit:

Which is a better preparation for 21st century algebra: the "division starter" method, or traditional long division?

1 comment:

Auntie Ann said...

I just showed the first problem to our 7th grader (whose grade school used EM.) She laughed and thought it was stupid. "Why don't you just divide 2000 by 42?!" she said.