Question

Answer 1

c: =-7/12+9/12=2/12=1/6

g: \(=\dfrac{4}{9}\cdot\dfrac{-15}{8}=\dfrac{-60}{72}=\dfrac{-5}{6}\)

k: \(=\dfrac{3}{5}\cdot\dfrac{15}{7}\cdot\dfrac{28}{9}=\dfrac{3}{7}\cdot\dfrac{28}{9}\cdot3=\dfrac{28}{7}=4\)

Answer 2

`c)([-7]/12)+0,75=[-7]/12+3/4=[-7]/12+9/12=2/12=1/6`

`g)4/9:(-8/15)=4/9 . (-15/8)=-5/6`

`k)([-3]/5).(15/[-7]) .3 1/9=3/5 . 15/7 . 28/9=4`

Answer 3

`(-7/12) + 0,75= (-7/12) + 3/4= -7/12 + 9/12 = 1/6`

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`4/9 : (-8/15)= 4/9 xx (-15/8)=-5/6`

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`(-3/5)(15/-7). 3 1/9= 3/7 . 28/9 . 3 = 4`