N89 a) 10$$\frac{11}{15}$$-3$$\frac{1}{5}$$-4$$\frac{2}{10}$$ c) 12$$\frac{7}{12}$$-4$$\frac{1}{8}$$-4$$\frac{1}{3}$$ b) 8$$\frac{8}{9}$$+2$$\frac{11}{18}$$-3$$\frac{1}{4}$$ 2) 14$$\frac{7}{24}$$-8$$\frac{1}{16}$$-5$$\frac{1}{6}$$ q)22$$\frac{1}{3}$$-(10$$\frac{7}{12}$$+9$$\frac{11}{20}$$) e) 10-(5$$\frac{7}{8}$$ +3$$\frac{5}{12}$$)

a) 10$$\frac{11}{15}$$-3$$\frac{1}{5}$$-4$$\frac{2}{10}$$ = 10$$\frac{11}{15}$$-3$$\frac{3}{15}$$-4$$\frac{3}{15}$$ = 10$$\frac{11}{15}$$-7$$\frac{6}{15}$$ = 3$$\frac{5}{15}$$ = 3$$\frac{1}{3}$$

c) 12$$\frac{7}{12}$$-4$$\frac{1}{8}$$-4$$\frac{1}{3}$$ = 12$$\frac{14}{24}$$-4$$\frac{3}{24}$$-4$$\frac{8}{24}$$ = 12$$\frac{14}{24}$$-8$$\frac{11}{24}$$ = 4$$\frac{3}{24}$$ = 4$$\frac{1}{8}$$

b) 8$$\frac{8}{9}$$+2$$\frac{11}{18}$$-3$$\frac{1}{4}$$ = 8$$\frac{32}{36}$$+2$$\frac{22}{36}$$-3$$\frac{9}{36}$$ = 10$$\frac{54}{36}$$-3$$\frac{9}{36}$$ = 7$$\frac{45}{36}$$ = 8$$\frac{9}{36}$$ = 8$$\frac{1}{4}$$

2) 14$$\frac{7}{24}$$-8$$\frac{1}{16}$$-5$$\frac{1}{6}$$ = 14$$\frac{14}{48}$$-8$$\frac{3}{48}$$-5$$\frac{8}{48}$$ = 14$$\frac{14}{48}$$-13$$\frac{11}{48}$$ = 1$$\frac{3}{48}$$ = 1$$\frac{1}{16}$$

q) 22$$\frac{1}{3}$$-(10$$\frac{7}{12}$$+9$$\frac{11}{20}$$) = 22$$\frac{1}{3}$$-(10$$\frac{35}{60}$$+9$$\frac{33}{60}$$) = 22$$\frac{1}{3}$$-19$$\frac{68}{60}$$ = 22$$\frac{20}{60}$$-19$$\frac{68}{60}$$ = 21$$\frac{80}{60}$$-19$$\frac{68}{60}$$ = 2$$\frac{12}{60}$$ = 2$$\frac{1}{5}$$

e) 10-(5$$\frac{7}{8}$$ +3$$\frac{5}{12}$$) = 10-(5$$\frac{21}{24}$$ +3$$\frac{10}{24}$$) = 10-8$$\frac{31}{24}$$ = 10-9$$\frac{7}{24}$$ = $$\frac{17}{24}$$

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