problem: fractions calculations add and subtract 3
Determine the lowest common denominator and calculate the value, reduce the solution and write as a mixed fractions if possible!
8 3/10 – 5 1/2 – 1 5/6 =
answer: fractions calculations add and subtract 3
the lowest common denominator:
10 = 2 * 5
2 = 1 * 2
6 = 2 * 3
2 * 3 * 5 = 30
calculate the value:
to make the bottom numbers the same you have to multiply the top and the bottom of
the first fraction with 3 (because 10 * 3 = 30)
the second fraction with 15 (because 2 * 15 = 30)
the third fraction with 5 (because 6 * 5 = 30)
83/10 – 11/2 – 11/6 =
83*3/10*3 – 11*15/2*15 – 11*5/6*5 =
249/30 – 165/30 – 55/20 =
249/30 – 220/30 = 29/30