Wednesday

August 20, 2014

August 20, 2014

Posted by **nita** on Thursday, July 26, 2012 at 3:01am.

- 9th grade math -
**Jai**, Thursday, July 26, 2012 at 9:01am3 5/8 - 1 3/4

To do this, first we convert the mixed numbers to improper fractions. To convert we multiply the denominator (the number under the line) by the constant then add this answer to the numerator (number above the line), while retaining the denominator. Doing this,

3 5/8 = ((8 x 3) + 5) / 8 = (24 + 5)/8 = 29/8

1 3/4 = ((4 x 1) + 3) / 4 = (4 + 3)/4 = 7/4

Rewriting the expression,

29/8 - 7/4

Note that we cannot perform addition or subtraction operation when the denominators are not equal. Thus we find the LCD (least common denominator). The LCD is 8. We convert the fractions into fractions with 8 as the denominator. For the first term, the denominator is already 8, while for the second term, we divide 8 by 4 and multiply this by the numerator:

29/8 - 14/8

15/8 or 1 7/8

hope this helps~ :)

**Related Questions**

9th grade math - How does 3 and5/8 minus1 and3/4 equal1 and3/4

9th grade math - How does 3 and5/8 minus1 and3/4 equal1 and3/4

math - a rectangle with sides 6.5 km and3.4km

math - the volume of a container that is 8" long 4" long and3' high is _cu in. ...

trig - In a right triangle the hypotenuse has length 10 and the the sum of the ...

physics - A charge of 8 pC is uniformly distributed throughout the volume ...

9th Grade Courses - For 9th grade science, which would be easier to take? ...

9th grade - I'm doing this word search for my 9th grade honors physical science ...

9th grade classes - I'm choosing which classes I want to take for freshman year ...

Biology - Is 9th grade biology hard? Is it interesting...?? I love life science...