Question

a) 3,5 + -9/8 

b) 2 1/3 + -5/9

c) -1,25 - 1 1/5

Answer 1

a: \(3,5+\dfrac{-9}{8}=\dfrac{7}{2}-\dfrac{9}{8}=\dfrac{27}{8}-\dfrac{9}{8}=\dfrac{18}{8}=\dfrac{9}{4}\)

b: \(2\dfrac{1}{3}+\dfrac{-5}{9}=\dfrac{7}{3}-\dfrac{5}{9}=\dfrac{21}{9}-\dfrac{5}{9}=\dfrac{16}{9}\)

c: \(-1,25-1\dfrac{1}{5}=-1,25-1,2=-2,45\)