Thursday, May 20, 2010

Math problems of the week: 3rd grade Everyday Math vs. Singapore Math

I. Final division problems in the first half of the 3rd grade Everyday Math curriculum, Student Math Journal, Volume 1, pp. 154-5 (final set of Math Boxes):

3 ÷ 6 = _____
12 ÷ 4 = _____
20 ÷ 5 = _____
_____ = 14 ÷ 7
_____ = 9 ÷ 3

Write 4 division facts you need to practice.

Complete the Fact Triangle.  [Triangle with 45 in the top corner, 5 in the lower left corner, blank line in the lower right corner, and × and ÷ in the middle.] Write the fact family.

II. Final division problems in the first half of the 3rd grade Singapore Math curriculum, Primary Mathematics 3B (Standards Edition), p. 180-183 (Review 5):

440 ÷ 9 = 

The product of two numbers is 72. If one number is 9, what is the other number?

6 children bought a present for $42. They shared the cost equally.  How much did each child pay?

A fruit seller packed 108 apples into bags of 5. How many bags were there? How many apples were left over?

The total weight of a textbook and 8 notebooks is 800 g. The weight of the textbook is 200 g. If the notebooks are of the same weight, find the weight of each notebook.

III. Extra Credit

Do Singapore Math students miss out on opportunities to develop meta-cognitive awareness by not being asked to write down what they need to practice?

1 comment:

Barry Garelick said...

I find it interesting that in EM's set of division problems for the third grade, one problem is 3 divided by 6. I strongly suspect that there has been no preparation on how to solve this type of problem. They certainly haven't had fractions to the extent that they would know that 3 divided by 6 = 3/6. I suppose the teacher facilitates discussion of that problem in the various small groups the students are placed into, and they are led to discover wondrous things.