April 3,2009
Think and Discuss
The first thing that pops into my head when I here the terms cross multiply it helps me solve proportion by multiplying the numerator from one ratio and multiply the denominator by the other ratio numerator. After multiplying i would find out if its proportion or not.
Identify the error in this problem:
2/3 = x/12 2x = 36; x = 18
The error in this problem is that they multiplied 3 x 12 which they was suppose to multiply
2 x 12. This is how the problem should have been
2/3 = x/12
3x = 24
x = 8
Are this proportional ?
6/45 and 2/15
6 x 15 = 90 45 x 2 = 90
Both problems are the same answer so this problem is proportional
No comments:
Post a Comment