## Wednesday, April 30, 2008

### Math problem of the week: Everyday Math vs. Singapore Math

1. From unit 2 of the Everyday Math grade 2 Student Math Journal, volume 1, p. 44  (volume 1, of 2, 164 pages total)

There are 10 houses on Jerry's block.  There are 15 houses on Nancy's block.  How many more houses are on Nancy's block?
___houses

Write a number model
_____________________________________

A pack of gum costs 25¢.  Sean bought 3 packs.  How much money did he spend?

___

2. From unit 2 of the Singapore Math grade 2 Primary Mathematics Workbook, volume 1 (2a), p. 54 (volume 1, of 2, 192 pages total)

Mrs. Bates bought an oven for \$393.
She also bought a refrigerator for \$438.
How much did she spend altogether?

She spend \$____ altogether

There are 468 desks in a hall.
There are 156 more chairs than desks.
How many chairs are there in the hall?

There are ___ chairs in the hall.

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Place value and borrowing/carrying (regrouping): the bigger picture:

Grade 2 Singapore Math teaches place value in Unit 1 and regrouping in Unit 2.

Grade 2 Everyday Math teaches place value in Unit 3.  Not until Unit 12, the final unit of the the grade 2 curriculum, do students do problems comparable to the Singapore problems above.  I.e., problems like 356 + 275 (cf. p. 302), which are specially classified as "harder" problems, and for which you are invited to use "your favorite addition strategy."