1. 直接写出得数。
实际用时:分钟
$\frac{2}{3}+\frac{5}{9}=$
$\frac{2}{3}-\frac{5}{9}=$
$\frac{2}{3}×\frac{5}{9}=$
$\frac{2}{3}÷\frac{5}{9}=$
$2+\frac{5}{8}=$
$2-\frac{5}{8}=$
$0.2×\frac{5}{8}=$
$2÷\frac{5}{8}=$
$1\frac{2}{5}+0=$
$1\frac{2}{5}-1=$
$\frac{5}{18}×1=$
$\frac{5}{18}÷1=$
$\frac{5}{18}+\frac{1}{3}=$
$\frac{5}{8}-\frac{1}{4}=$
$3.6×\frac{5}{18}=$
$\frac{9}{5}÷0.3=$
$\frac{5}{3}+\frac{1}{4}=$
$\frac{5}{2}-1.5=$
$24×\frac{1}{6}=$
$3.2÷\frac{4}{5}=$
$\frac{2}{3}+\frac{3}{5}=$
$\frac{1}{9}-\frac{1}{11}=$
$\frac{2}{5}×\frac{5}{12}=$
$\frac{3}{5}÷0.6=$
实际用时:分钟
$\frac{2}{3}+\frac{5}{9}=$
$\frac{2}{3}-\frac{5}{9}=$
$\frac{2}{3}×\frac{5}{9}=$
$\frac{2}{3}÷\frac{5}{9}=$
$2+\frac{5}{8}=$
$2-\frac{5}{8}=$
$0.2×\frac{5}{8}=$
$2÷\frac{5}{8}=$
$1\frac{2}{5}+0=$
$1\frac{2}{5}-1=$
$\frac{5}{18}×1=$
$\frac{5}{18}÷1=$
$\frac{5}{18}+\frac{1}{3}=$
$\frac{5}{8}-\frac{1}{4}=$
$3.6×\frac{5}{18}=$
$\frac{9}{5}÷0.3=$
$\frac{5}{3}+\frac{1}{4}=$
$\frac{5}{2}-1.5=$
$24×\frac{1}{6}=$
$3.2÷\frac{4}{5}=$
$\frac{2}{3}+\frac{3}{5}=$
$\frac{1}{9}-\frac{1}{11}=$
$\frac{2}{5}×\frac{5}{12}=$
$\frac{3}{5}÷0.6=$
答案
1. $\frac{11}{9}$ $\frac{1}{9}$ $\frac{10}{27}$ $\frac{6}{5}$
$\frac{21}{8}$ $\frac{11}{8}$ $\frac{1}{8}$ $\frac{16}{5}$
$\frac{7}{5}$ $\frac{2}{5}$ $\frac{5}{18}$ $\frac{5}{18}$
$\frac{11}{18}$ $\frac{3}{8}$ $1$ $6$
$\frac{23}{12}$ $1$ $4$ $4$
$\frac{19}{15}$ $\frac{2}{99}$ $\frac{1}{6}$ $1$
$\frac{21}{8}$ $\frac{11}{8}$ $\frac{1}{8}$ $\frac{16}{5}$
$\frac{7}{5}$ $\frac{2}{5}$ $\frac{5}{18}$ $\frac{5}{18}$
$\frac{11}{18}$ $\frac{3}{8}$ $1$ $6$
$\frac{23}{12}$ $1$ $4$ $4$
$\frac{19}{15}$ $\frac{2}{99}$ $\frac{1}{6}$ $1$
2. 计算下面各题。
$\frac{1}{9}×\frac{18}{25}×\frac{5}{6}$
$\frac{14}{15}÷\frac{7}{5}÷\frac{8}{9}$
$\frac{5}{8}÷\frac{3}{4}×\frac{2}{3}$
$\frac{1}{9}×\frac{18}{25}×\frac{5}{6}$
$\frac{14}{15}÷\frac{7}{5}÷\frac{8}{9}$
$\frac{5}{8}÷\frac{3}{4}×\frac{2}{3}$
答案
2. $\frac{1}{15}$ $\frac{3}{4}$ $\frac{5}{9}$
3. 连一连。
$\frac{1}{3}×\frac{1}{8}×6$ $\frac{1}{4}×\frac{3}{5}×\frac{5}{9}$ $\frac{9}{8}×\frac{1}{2}×\frac{4}{3}$ $\frac{1}{9}×\frac{6}{5}×\frac{1}{2}$
$\frac{1}{12}$ $\frac{1}{4}$ $\frac{1}{15}$ $\frac{3}{4}$
$\frac{1}{3}×\frac{1}{8}×6$ $\frac{1}{4}×\frac{3}{5}×\frac{5}{9}$ $\frac{9}{8}×\frac{1}{2}×\frac{4}{3}$ $\frac{1}{9}×\frac{6}{5}×\frac{1}{2}$
$\frac{1}{12}$ $\frac{1}{4}$ $\frac{1}{15}$ $\frac{3}{4}$
答案
3.
如果1⊕2=1+11,2⊕3=2+22+222,3⊕4=3+33+333+3333,那么(5⊕3)×4的值是多少?
答案
【思维提升】2460
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