Weekly+Lessons

The following is this week's math lesson. You may refer back to this page for reference and extra help on a subject.

=Fractions=

Adding and subtracting with different denominators
example 1/4 + 1/2= ?


 * The first step in solving these types of problems is to find the LCD (lowest common denominator)**

[|LCD method 1]Follow this link for more help with lowest common denominators. Be sure to read method 1 and the re-write each fraction as an equivalent fraction sections.

For example multiples of 2 would be (2,**4**,6,**8**,10...etc) And multiples of 4 would be (**4**,**8**,12,16,20...etc)
 * The LCD is a multiple that the denominators share.**

The bolded numbers are the multiples that 2 and 4 share. The lowest of which is 4. So 1/2 multiplied by 2 becomes 2/4. 1/4 + 2/4= **3/4** = = =**[|Conversions]**=
 * For 2 to equal 4, 2 must be multiplied by 2. Also remember that what is done**
 * in the denominator must also be done in the numerator.**
 * Then simply add the two fractions. Remember when adding fractions, only add the numerators.**

Converting from a decimal to a percent

 * multiply by 100 and add a % sign
 * **example:** 0.25 x 100 = 25

**Converting from a fraction to a decimal**

 * Divide the top number (the numerator) by the bottom number (the denominator)
 * **example:** 1/4 = 1 ÷ 4 = 0.25