a: =-1/12-21/8+1/3
=-2/24-63/24+8/24
=-57/24=-19/8
b: \(=-\dfrac{7}{4}+\dfrac{1}{9}+\dfrac{37}{18}=\dfrac{-63+7+74}{36}=\dfrac{18}{36}=\dfrac{1}{2}\)
c: =2/5-4/3-1/2
=12/20-40/30-15/30
=-43/30
d: =1/2-1/5+3/10
=5/10-2/10+3/10
=6/10=3/5
e: =8+5/11+3+5/8-3-5/11
=5/8+8=8,625
f: =-7(4/9+6+5/9)
=-7*7=-49
g: =-1/4(13+9/11+6+2/11)
=-1/4*20=-5
h
\(=\dfrac{52}{5}+\dfrac{27}{23}+\dfrac{1}{2}-\dfrac{5}{27}+\dfrac{16}{23}\\ =\dfrac{104}{10}+\dfrac{5}{10}+\dfrac{27}{23}+\dfrac{16}{23}\\ =\dfrac{109}{10}+\dfrac{43}{23}\\ =\dfrac{2507}{230}+\dfrac{430}{230}\\ =\dfrac{2937}{230}\)
i
\(=\left(\dfrac{3}{8}.\dfrac{136}{5}-\dfrac{256}{5}.\dfrac{3}{8}\right)+19\\ =\dfrac{3}{8}\left(\dfrac{136}{5}-\dfrac{256}{5}\right)+19\\ =\dfrac{3}{8}.-\dfrac{120}{5}+19\\ =\dfrac{3}{8}.\left(-24\right)+19\\ =-\dfrac{72}{8}+19\\ =-9+19\\ =10\)
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