Question

( 1+ 1/2 ) . ( 1+ 1/3 ) . ( 1+ 1/4 )

1/5 : 1/10 - 1/3 ( 6/5 - 9/4 )

-7/8 : 21/16 - 3/5 . ( 1/5 - 7/10 ) 

Answer 1

a: \(=\dfrac{3}{2}\cdot\dfrac{4}{3}\cdot\dfrac{5}{4}=\dfrac{5}{2}\)

b: \(=\dfrac{1}{5}\cdot10-\dfrac{1}{3}\cdot\dfrac{24-45}{20}=2-\dfrac{-7}{20}=2+\dfrac{7}{20}=\dfrac{47}{20}\)

c: \(=\dfrac{-7}{8}\cdot\dfrac{16}{21}-\dfrac{3}{5}\cdot\dfrac{-1}{2}\)

\(=\dfrac{-2}{3}+\dfrac{3}{10}=\dfrac{-20+9}{30}=\dfrac{-11}{30}\)

Answer 2

( 1+ 1/2 ) . ( 1+ 1/3 ) . ( 1+ 1/4 )=5/2

1/5 : 1/10 - 1/3 ( 6/5 - 9/4 )=47/20

-7/8 : 21/16 - 3/5 . ( 1/5 - 7/10 ) =-11/30

Answer 3

( 1+ 1/2 ) . ( 1+ 1/3 ) . ( 1+ 1/4 )=3/2 . 4/3 . 5/4 =5/2

1/5 : 1/10 - 1/3 ( 6/5 - 9/4 )=2 - 1/3 . -21/20=2 + 7/20=47/20

-7/8 : 21/16 - 3/5 . ( 1/5 - 7/10 ) =-2/3 + 3/10=-11/30