Question

Giúp êm với ạ êm đag cần gấp:<

Answer 1

a: \(=\dfrac{-4}{9}\left(\dfrac{7}{15}+\dfrac{8}{15}\right)=\dfrac{-4}{9}\)

b: \(=\dfrac{-5}{4}\left(\dfrac{16}{25}+\dfrac{9}{25}\right)=\dfrac{-5}{4}\)

c: \(=\left(4+\dfrac{11}{23}+2+\dfrac{12}{23}\right)-\dfrac{9}{14}-\dfrac{5}{4}\)

\(=7-\dfrac{9}{14}-\dfrac{5}{4}=\dfrac{143}{28}\)

d: \(=\left(2+\dfrac{13}{27}+3+\dfrac{14}{27}\right)-\left(\dfrac{7}{15}+\dfrac{8}{15}\right)\)

=5+1-1

=5

e: \(=11+\dfrac{1}{4}-2-\dfrac{5}{7}-5-\dfrac{1}{4}=4-\dfrac{5}{7}=\dfrac{23}{7}\)

g: \(=\dfrac{7}{19}\left(\dfrac{8}{11}+\dfrac{3}{11}\right)+\dfrac{12}{19}=\dfrac{7}{19}+\dfrac{12}{19}=1\)

Answer 2

\(a)-4/9*(7/15+8/15)=-4/9*1=-4/9\)

\(b)-5/4*(16/25+9/25)=-5/4*1=-5/4\)

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