Example: 2/5 + 3/8 + 1/2
LCD of 5, 8, 2 is 40 so:
40 ÷ 5 = 8 → 2/5 = 2x8/5x8 = 16/40
40 ÷ 8 = 5 → 3/8 = 3x5/8x5 = 15/40
40 ÷ 2 = 20 → 1/2 = 1x20/2x20 = 20/40
→ 2/5 + 3/8 + 1/2 = 16/40 + 15/40 + 20/40
= 16+15+20/40
= 51/40
= 111/40
By multiplying the denominators together this gives 5 x 8 x 2 = 80, so:
80 ÷ 5 = 16 → 2/5 = 2x16/5x16 = 32/80
80 ÷ 8 = 10 → 3/8 = 3x10/8x10 = 30/80
80 ÷ 2 = 40 → 1/2 = 1x40/2x40 = 40/80
→ 2/5 + 3/8 + 1/2 = 32/80 + 30/80 + 40/80
= 32+30+40/80
= 102/80
= 51x2/40x2
= 111/40
Using the LCD keeps the numbers smaller.
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To solve a Dissimilar Fraction,you must change the denominator to a similar fraction then proceed with the Adding/Subtracting Dissimilar Fraction...
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.
adding fractions r easy math prblems. like 1/4 +1/4 = 1/2.
You first convert them to similar fractions, i.e., to fractions that have the same denominator.* Step one: find a common denominator.* Step two: convert both fractions to equivalent fractions that have that denominator.
You basically have to learn separately how to do different things with fractions, including finding a common denominator; converting fractions to a different denominator; simplifying fractions; adding and subtracting fractions; multiplying fractions; dividing fractions.