Friday, May 20, 2011

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

I. From 5th grade Investigations "Skill Check 5", administered in mid November:


STOP. Don't start yet. Star problems that may have odd answers.

1.

953
× 7
 

2.

624
×80


3.

  53
×46


4.

   87
× 65


5.

569
× 37



6.
  ___
6|428


7.
     ___
80|646


8.
     ____
70|5,044


9.
     ____
31|1,984


10.
     _____
49|3,3,43


II. From the Singapore Math Primary Mathematics 5A Workbook, Review I, pp. 20-21:

Estimate the value of

(a) 6903 × 22

(b) 8548 × 329

(c) 9869 × 899

(d) 37,496 ÷ 603

(e) 55,349 ÷ 7168

(f) 71,375 ÷ 8236


III. Extra Credit:

Solve for x:

In the next unit, students using curriculum x go on to actually calculate multi-digit multiplication and division problems.

1 comment:

Deirdre Mundy said...

What do they mean, star problems that MAY have odd answers?

By fifth grade, kids should know that:
o*o=o
e*o=e
e*e=e

There shouldn't be any 'may' involved!