Today, I was assigned to do questions 3 and 4 on page 142

3.Use mental math to determine the following:

A. 300% of 2000

2000=100% 100 x 3 = 300

2000 x 3 = 6000

B. 1/4% of 60

1% of 60 is 0.6

C. 0.1% of 40

1 divided by 100 = 0.1

1 divide by 40 = 0.025

0.1% og 40 is 0.025

4.

A. 20% of 60

If you divide 100% by 5 you will get 20%.

If you divide 60 by 5 you will get 12.

B. 250% of 400

200% of 400 is 800 because 400 x 2 = 800

50% of 400 is 200 because 400 divided 2 = 200

Then, you just add 200 and 800 togethere to 1000

C. 10 1/2% of 100

1/2% of 100 is 5

10% of 100 is 10

10 + 5 = 15

## Tuesday, January 26, 2010

Subscribe to:
Post Comments (Atom)

## No comments:

Post a Comment