a/ \(\frac{2}{3}-4.\left(\frac{1}{2}+\frac{3}{4}\right)\)
= \(\frac{2}{3}-2-3\)
=\(\frac{2}{3}-5\)
=\(\frac{2}{3}-\frac{15}{3}\)
=\(\frac{-13}{3}\)
b/\(\left(-\frac{1}{3}+\frac{5}{6}\right).11-7\)
=\(\frac{-11}{3}+\frac{55}{6}-7\)
=\(\frac{-22}{6}+\frac{55}{6}-7\)
= \(\frac{11}{2}-\frac{14}{2}\)
=\(\frac{-3}{2}\)
c/\(\frac{3}{11}.\frac{4}{15}+\frac{19}{15}.\frac{-3}{11}\)
=\(\frac{4}{55}\)\(-\frac{19}{55}\)
=\(\frac{-3}{11}\)
a) \(\frac{2}{3}-4.\left(\frac{1}{2}+\frac{3}{4}\right)=\frac{2}{3}-4.\left(\frac{2}{4}+\frac{3}{4}\right)\)
\(=\frac{2}{3}-4.\frac{5}{4}=\frac{2}{3}-5=\frac{-13}{3}\)
b) \(\left(-\frac{1}{3}+\frac{5}{6}\right).11-7\)
\(=\frac{3}{6}.11-7=\frac{1}{2}.11-7\)
\(=\frac{11}{2}-7=-\frac{3}{2}\)
c) \(\frac{3}{11}.\frac{4}{15}+\frac{19}{15}.\frac{-3}{11}\)
\(=\frac{3}{11}.\left(\frac{4}{15}-\frac{19}{15}\right)\)
\(=\frac{3}{11}.\left(-1\right)=-\frac{3}{11}\)
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