4) 5(2)/(3)-3(5)/(6) 5) 4(2)/(5):1(3)/(5) 6) 5(5)/(6)-2(1)/(21) 7) 2(2)/(11)+(2)/(11) 8) 5(1)/(3)cdot 5 4) 3cdot 4(1)/(3) 5) 4(5)/(6)-3(5)/(8) 6) 1(2)/(19)cdot 1(2)/(7) 7) 1(8)/(21)+3(2)/(7) 8) 2-1(12)/(19)

4) $5\frac {2}{3}-3\frac {5}{6}$<br />$=5\frac {4}{6}-3\frac {5}{6}$<br />$=2\frac {1}{6}$<br /><br />5) $4\frac {2}{5}:1\frac {3}{5}$<br />$=\frac {22}{5}:\frac {8}{5}$<br />$=\frac {22}{8}$<br />$=2\frac {6}{8}$<br />$=2\frac {3}{4}$<br /><br />6) $5\frac {5}{6}-2\frac {1}{21}$<br />$=5\frac {35}{42}-2\frac {1}{21}$<br />$=5\frac {35}{42}-2\frac {2}{42}$<br />$=5\frac {33}{42}$<br />$=5\frac {11}{14}$<br /><br />7) $2\frac {2}{11}+\frac {2}{11}$<br />$=2\frac {4}{11}$<br /><br />8) $5\frac {1}{3}\cdot 5$<br />$=\frac {16}{3}\cdot 5$<br />$=\frac {80}{3}$<br />$=26\frac {2}{3}$<br /><br />4) $3\cdot 4\frac {1}{3}$<br />$=3\cdot \frac {13}{3}$<br />$=13$<br /><br />5) $4\frac {5}{6}-3\frac {5}{8}$<br />$=4\frac {20}{24}-3\frac {15}{24}$<br />$=1\frac {5}{24}$<br /><br />6) $1\frac {2}{19}\cdot 1\frac {2}{7}$<br />$=\frac {21}{19}\cdot \frac {9}{7}$<br />$=\frac {189}{133}$<br />$=1\frac {56}{133}$<br /><br />7) $1\frac {8}{21}+3\frac {2}{7}$<br />$=\frac {29}{21}+3\frac {6}{21}$<br />$=4\frac {5}{21}$<br /><br />8) $2-1\frac {12}{19}$<br />$=2-\frac {30}{19}$<br />$=\frac {38}{19}-\frac {30}{19}$<br />$=\frac {8}{19}$