## Thursday, June 26, 2008

### Math problems of the week: Grade 4 Trailblazers vs. Singapore Math

1. From the beginning of the Trailblazers Grade 4 Student Guide (p. 63):

Homework

Dear Family Member:

Your child is learning the multiplication facts for 5s and 10s. He or she might find skip counting (5, 10, 15, 2, etc.) helpful in solving the problems below. Remind your child to bring home the flash cards for the 5s and 10s. Help him or her study these handy facts. Thanks for your cooperation.

1. How much is 5 dimes?

2. How much is 8 nickels?

3. How much is 4 dimes and 4 nickels?

5. Jerome placed 5 plates on the table for dinner. Each plate received 4 pieces of silverware (fork, spoon, and knife). How many pieces of silverware were placed on the table.

6. Write a story to show 5 + 9. Draw a picture to do with your story. Write a number sentence on your picture.

7. Skip count from 0 to 100 by 5s.  Write down the numbers as you count.

8. Skip count from 0 to 20 by 10s.  Write down the numbers as you count.

2. From the beginning of the Singapore Math Grade 4 workbook (Primary Mathematics 4a) (p. 24):

Write the missing factors.  Use only prime numbers.

(a) 64 = 2 X 8 X ____ X ____
(b) 84 = 6 X ____ X ____
(c) 45 = ____ X ____ X 5
(d) 72 = ____ X 4 X  ____ X ____

Write the missing factors represented by n.
(a) 24 + 3 X 2 X n
(b) 18 = 3 X n X 2
(c) 25 X 4 = 5 X n X 4
(d) 21 X 20 = 21 X  2 X n
(e) 3 X 32 = 6 X n
(f) 16 X 2 = n X 4