一、口算。
$369 + 33 =$ $3.14×30^{2} =$ $\frac{3}{16} + \frac{1}{4} =$
$\frac{3}{4} + 75\% =$ $\frac{5}{6}÷\frac{5}{7} =$ $7×2.4 =$
$3500÷50 =$ $\frac{7}{12}×\frac{9}{14} =$ $0.52 + 3.8 =$
$\frac{1}{2} + \frac{4}{9} =$ $\frac{5}{18} - \frac{7}{36} =$ $1.17÷0.13 =$
$440×25\% =$ $\frac{4}{7}÷\frac{2}{5} =$ $6 - 5.28 =$
$\frac{5}{2} - \frac{2}{5} =$ $\frac{4}{5}×45 =$ $58\% + 52\% =$
$320×4 =$ $6.4 - 4.6 =$ $\frac{3}{10}×\frac{20}{33} =$

一、402 2826 $\frac{7}{16}$ $\frac{3}{2}$ $\frac{7}{6}$ 16.8 70 $\frac{3}{8}$ 4.32 $\frac{17}{18}$ $\frac{1}{12}$ 9 110 $\frac{10}{7}$ 0.72 $\frac{21}{10}$ 36 110% 1280 1.8 $\frac{2}{11}$

二、计算下面各题，怎样简便就怎样计算。
$\frac{5}{16}÷(\frac{7}{8} - 25\%) + \frac{3}{4}$ $2.5×56 + 4.5×65$ $5.8×[1 + (2.1 - 2.09)]$
$44×111 + 777×8$ $(\frac{3}{4} + \frac{3}{5})÷9×\frac{10}{13}$ $\frac{3}{8}×(\frac{9}{8} - 50\%)÷\frac{5}{16}$

二、$\frac{5}{4}$ 432.5 5.858 11100 $\frac{3}{26}$ $\frac{3}{4}$

$\frac{5}{16}÷(\frac{7}{8} - 25\%) + \frac{3}{4}$
$=\frac{5}{16}÷(\frac{7}{8} - \frac{1}{4}) + \frac{3}{4}$
$=\frac{5}{16}÷\frac{5}{8} + \frac{3}{4}$
$=\frac{5}{16}×\frac{8}{5} + \frac{3}{4}$
$=\frac{1}{2} + \frac{3}{4}$
$=\frac{5}{4}$
$2.5×56 + 4.5×65$
$=140 + 292.5$
$=432.5$
$5.8×[1 + (2.1 - 2.09)]$
$=5.8×[1 + 0.01]$
$=5.8×1.01$
$=5.858$
$44×111 + 777×8$
$=44×111 + 111×7×8$
$=44×111 + 111×56$
$=111×(44 + 56)$
$=111×100$
$=11100$
$(\frac{3}{4} + \frac{3}{5})÷9×\frac{10}{13}$
$=(\frac{15}{20} + \frac{12}{20})×\frac{1}{9}×\frac{10}{13}$
$=\frac{27}{20}×\frac{1}{9}×\frac{10}{13}$
$=\frac{3}{20}×\frac{10}{13}$
$=\frac{3}{26}$
$\frac{3}{8}×(\frac{9}{8} - 50\%)÷\frac{5}{16}$
$=\frac{3}{8}×(\frac{9}{8} - \frac{4}{8})×\frac{16}{5}$
$=\frac{3}{8}×\frac{5}{8}×\frac{16}{5}$
$=\frac{3}{8}×2$
$=\frac{3}{4}$