Answered

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Help ! its not a test i just don't understand!!

Help Its Not A Test I Just Dont Understand class=

Sagot :

An important rule before subtracting fractions, you must first make them have a common denominator. The common denominator is the LCM (Least Common Multiple) of the two different denominators.

You may use this formula:

[tex]\frac{a}{b}=\frac{(a)(\frac{c}{b})}{c}[/tex]

We get,

a.) 9/12 - 1/2 ; The LCM of 12 and 2 is 12.

[tex]\frac{9}{12}-\frac{1}{2}=\text{ }\frac{9}{12}-\frac{(1)(\frac{12}{2})}{12}=\text{ }\frac{9}{12}-\frac{(1)(6)}{12}=\frac{9}{12}-\frac{6}{12}[/tex][tex]\frac{9}{12}-\frac{6}{12}=\frac{3}{12}[/tex]

Therefore, the difference of 9/12 - 1/2 is 3/12. You shade letter B.

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