Explanation:
1 1/4 + ( 3 2/3 + 5 3/4)
First change them from mixed fractions to normal fractions.
= 5/4 + ( 11/3 + 23/4)
Then Find the LCM(lowest common factor) of 4 and 3 which is 12 so we'll multiply both 4 and 3 to the number so the answer would be 12. and also if we multiply the denominator we do the same to the numerator.
= 5/4 + (44/12 + 69/12)
add them.
= 5/4 + (44 + 69/12)
now find their LCM and do the same to them since 4 is a factor of 12 we'll multiply it by 3 to get 12 as a denominator to add.
= 5/4 + 113/12
= 15/4 + 113/12
= 15 + 113/12
add them.
= 128/12
Divide both numerator and the denominator by the LCM.
= 64/6
= 32/3
Answer: 32/3 or in mixed fraction: 10 2/3