1. 直接写出得数。
实际用时:分钟
$\frac{8}{7}+\frac{1}{2}=$ $\frac{5}{14}-\frac{1}{7}=$ $\frac{7}{13}×\frac{26}{7}=$ $\frac{1}{3}×\frac{1}{3}×\frac{1}{3}=$
$\frac{11}{6}÷\frac{1}{6}=$ $\frac{7}{8}+\frac{3}{5}=$ $\frac{5}{8}×24=$ $\frac{1}{2}÷\frac{1}{2}÷\frac{1}{2}=$
$\frac{10}{9}-\frac{2}{3}=$ $\frac{9}{10}÷\frac{3}{5}=$ $\frac{1}{8}+\frac{5}{4}=$ $\frac{1}{3}÷9×\frac{27}{13}=$
$2-\frac{2}{3}=$ $\frac{15}{14}×\frac{7}{5}=$ $\frac{32}{11}÷16=$ $\frac{1}{5}×\frac{5}{8}÷\frac{3}{16}=$
$\frac{9}{8}+\frac{1}{8}=$ $15÷\frac{5}{6}=$ $\frac{15}{11}×\frac{3}{5}=$ $\frac{1}{3}×(1-\frac{1}{4})=$
$\frac{1}{2}-\frac{7}{32}=$ $\frac{14}{25}÷\frac{7}{25}=$ $\frac{5}{8}×\frac{5}{11}=$ $\frac{4}{5}÷(1-\frac{4}{5})=$
实际用时:分钟
$\frac{8}{7}+\frac{1}{2}=$ $\frac{5}{14}-\frac{1}{7}=$ $\frac{7}{13}×\frac{26}{7}=$ $\frac{1}{3}×\frac{1}{3}×\frac{1}{3}=$
$\frac{11}{6}÷\frac{1}{6}=$ $\frac{7}{8}+\frac{3}{5}=$ $\frac{5}{8}×24=$ $\frac{1}{2}÷\frac{1}{2}÷\frac{1}{2}=$
$\frac{10}{9}-\frac{2}{3}=$ $\frac{9}{10}÷\frac{3}{5}=$ $\frac{1}{8}+\frac{5}{4}=$ $\frac{1}{3}÷9×\frac{27}{13}=$
$2-\frac{2}{3}=$ $\frac{15}{14}×\frac{7}{5}=$ $\frac{32}{11}÷16=$ $\frac{1}{5}×\frac{5}{8}÷\frac{3}{16}=$
$\frac{9}{8}+\frac{1}{8}=$ $15÷\frac{5}{6}=$ $\frac{15}{11}×\frac{3}{5}=$ $\frac{1}{3}×(1-\frac{1}{4})=$
$\frac{1}{2}-\frac{7}{32}=$ $\frac{14}{25}÷\frac{7}{25}=$ $\frac{5}{8}×\frac{5}{11}=$ $\frac{4}{5}÷(1-\frac{4}{5})=$
答案
1. $\frac{23}{14}$ $\frac{3}{14}$ $2$ $\frac{1}{27}$
$11$ $\frac{59}{40}$ $15$ $2$
$\frac{4}{9}$ $\frac{3}{2}$ $\frac{11}{8}$ $\frac{1}{13}$
$\frac{4}{3}$ $\frac{3}{2}$ $\frac{2}{11}$ $\frac{2}{3}$
$\frac{5}{4}$ $18$ $\frac{9}{11}$ $\frac{1}{4}$
$\frac{9}{32}$ $2$ $\frac{25}{88}$ $4$
$11$ $\frac{59}{40}$ $15$ $2$
$\frac{4}{9}$ $\frac{3}{2}$ $\frac{11}{8}$ $\frac{1}{13}$
$\frac{4}{3}$ $\frac{3}{2}$ $\frac{2}{11}$ $\frac{2}{3}$
$\frac{5}{4}$ $18$ $\frac{9}{11}$ $\frac{1}{4}$
$\frac{9}{32}$ $2$ $\frac{25}{88}$ $4$
2. 计算下面各题。
$\frac{11}{12} ÷ (1 - \frac{1}{6} - \frac{3}{8})$
$\frac{8}{21} × (\frac{5}{6} ÷ \frac{5}{9} - \frac{1}{3})$
$36 × (\frac{3}{4} - \frac{2}{9} - \frac{1}{12})$
$\frac{11}{12} ÷ (1 - \frac{1}{6} - \frac{3}{8})$
$\frac{8}{21} × (\frac{5}{6} ÷ \frac{5}{9} - \frac{1}{3})$
$36 × (\frac{3}{4} - \frac{2}{9} - \frac{1}{12})$
答案
2. $2$ $\frac{4}{9}$ $16$
3. 把下面的数按从小到大的顺序排列。
(1) $\frac{2}{3}$、$\frac{3}{5}$、0.7、6.4% (
(2) 3.14159、3.14、31.4%、$3\frac{1}{7}$ (
(1) $\frac{2}{3}$、$\frac{3}{5}$、0.7、6.4% (
6.4%
)<($\frac{3}{5}$
)<($\frac{2}{3}$
)<(0.7
)(2) 3.14159、3.14、31.4%、$3\frac{1}{7}$ (
31.4%
)<(3.14
)<(3.14159
)<($3\frac{1}{7}$
)答案
3. (1) $6.4\%$ < $\frac{3}{5}$ < $\frac{2}{3}$ < $0.7$
(2) $31.4\%$ < $3.14$ < $3.14159$ < $3\frac{1}{7}$
(2) $31.4\%$ < $3.14$ < $3.14159$ < $3\frac{1}{7}$
计算:$\frac{1}{2} × \frac{2}{3} × \frac{3}{4} × \frac{4}{5} × \dots × \frac{98}{99} × \frac{99}{100}$
答案
【思维提升】$\frac{1}{100}$
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