Question

20£®ÄܼòËãµÄÒª¼òËã

$\frac{5}{4}$¡Á48¡Á$\frac{1}{6}$	$\frac{1}{5}$+$\frac{2}{9}$¡Á$\frac{3}{10}$	$\frac{5}{9}$¡Á$\frac{3}{4}$+$\frac{5}{9}$¡Á$\frac{1}{4}$
2016¡Á$\frac{9}{2015}$	£¨$\frac{3}{4}$+$\frac{5}{8}$£©¡Á0.8	72-72¡Á$\frac{5}{12}$

Answer 1

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=$\frac{5¡Á48¡Á1}{4¡Á6}$
=10£»

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=$\frac{1}{5}$+$\frac{1}{15}$
=$\frac{4}{15}$£»

£¨3£©$\frac{5}{9}$¡Á$\frac{3}{4}$+$\frac{5}{9}$¡Á$\frac{1}{4}$
=$\frac{5}{9}$¡Á£¨$\frac{3}{4}$+$\frac{1}{4}$£©
=$\frac{5}{9}$¡Á1
=$\frac{5}{9}$£»

£¨4£©2016¡Á$\frac{9}{2015}$
=£¨2015+1£©¡Á$\frac{9}{2015}$
=2015¡Á$\frac{9}{2015}$+1¡Á$\frac{9}{2015}$
=9+$\frac{9}{2015}$
=9$\frac{9}{2015}$£»

£¨5£©£¨$\frac{3}{4}$+$\frac{5}{8}$£©¡Á0.8
=$\frac{3}{4}$¡Á0.8+$\frac{5}{8}$¡Á0.8
=0.6+0.5
=1.1£»

£¨6£©72-72¡Á$\frac{5}{12}$
=72-30
=42£®

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