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.