1. 直接写出得数。
实际用时:分钟
$\frac{2}{5}+\frac{1}{3}=$
$\frac{15}{16}-\frac{3}{4}=$
$\frac{7}{12}×\frac{6}{7}=$
$1÷\frac{17}{16}=$
$\frac{7}{18}+\frac{2}{9}=$
$\frac{16}{15}-1=$
$1.5×\frac{4}{5}=$
$\frac{15}{26}÷5=$
$\frac{7}{9}+\frac{5}{6}=$
$1-\frac{7}{30}=$
$\frac{9}{10}×30=$
$\frac{15}{14}÷\frac{15}{14}=$
$\frac{2}{5}+0.6=$
$0.5-\frac{1}{4}=$
$\frac{8}{15}×4.5=$
$7.2÷\frac{8}{9}=$
$\frac{7}{10}+\frac{2}{3}=$
$\frac{7}{8}-\frac{5}{24}=$
$8×\frac{1}{24}=$
$\frac{50}{27}÷2.5=$
$\frac{7}{9}+\frac{1}{2}=$
$\frac{9}{14}-\frac{2}{7}=$
$\frac{37}{15}×\frac{5}{37}=$
$\frac{9}{20}÷\frac{3}{10}=$
实际用时:分钟
$\frac{2}{5}+\frac{1}{3}=$
$\frac{15}{16}-\frac{3}{4}=$
$\frac{7}{12}×\frac{6}{7}=$
$1÷\frac{17}{16}=$
$\frac{7}{18}+\frac{2}{9}=$
$\frac{16}{15}-1=$
$1.5×\frac{4}{5}=$
$\frac{15}{26}÷5=$
$\frac{7}{9}+\frac{5}{6}=$
$1-\frac{7}{30}=$
$\frac{9}{10}×30=$
$\frac{15}{14}÷\frac{15}{14}=$
$\frac{2}{5}+0.6=$
$0.5-\frac{1}{4}=$
$\frac{8}{15}×4.5=$
$7.2÷\frac{8}{9}=$
$\frac{7}{10}+\frac{2}{3}=$
$\frac{7}{8}-\frac{5}{24}=$
$8×\frac{1}{24}=$
$\frac{50}{27}÷2.5=$
$\frac{7}{9}+\frac{1}{2}=$
$\frac{9}{14}-\frac{2}{7}=$
$\frac{37}{15}×\frac{5}{37}=$
$\frac{9}{20}÷\frac{3}{10}=$
答案
1. $\frac{11}{15}$ $\frac{3}{16}$ $\frac{1}{2}$ $\frac{16}{17}$
$\frac{11}{18}$ $\frac{1}{15}$ $\frac{6}{5}$ $\frac{3}{26}$
$\frac{29}{18}$ $\frac{23}{30}$ $27$ $1$
$1$ $\frac{1}{4}$ $\frac{12}{5}$ $\frac{81}{10}$
$\frac{41}{30}$ $\frac{2}{3}$ $\frac{1}{3}$ $\frac{20}{27}$
$\frac{23}{18}$ $\frac{5}{14}$ $\frac{1}{3}$ $\frac{3}{2}$
$\frac{11}{18}$ $\frac{1}{15}$ $\frac{6}{5}$ $\frac{3}{26}$
$\frac{29}{18}$ $\frac{23}{30}$ $27$ $1$
$1$ $\frac{1}{4}$ $\frac{12}{5}$ $\frac{81}{10}$
$\frac{41}{30}$ $\frac{2}{3}$ $\frac{1}{3}$ $\frac{20}{27}$
$\frac{23}{18}$ $\frac{5}{14}$ $\frac{1}{3}$ $\frac{3}{2}$
2. 计算下面各题。
$\frac{5}{9}×\frac{2}{7}+\frac{13}{9}×\frac{2}{7}$
$\frac{9}{8}×\frac{7}{10}-\frac{1}{8}÷\frac{10}{7}$
$(\frac{1}{2}-\frac{1}{3})×\frac{3}{5}+\frac{4}{9}$
$\frac{5}{9}×\frac{2}{7}+\frac{13}{9}×\frac{2}{7}$
$\frac{9}{8}×\frac{7}{10}-\frac{1}{8}÷\frac{10}{7}$
$(\frac{1}{2}-\frac{1}{3})×\frac{3}{5}+\frac{4}{9}$
答案
2. $\frac{4}{7}$ $\frac{7}{10}$ $\frac{49}{90}$
3. 在 $◯$ 里填上“>”“<”或“=”。
$\frac{3}{4} ÷ (1 + \frac{1}{8}) ◯ \frac{3}{4} × (1 + \frac{1}{8})$
$\frac{7}{8} ÷ (1 + \frac{1}{7}) ◯ \frac{7}{8} + \frac{7}{8} ÷ \frac{1}{7}$
$\frac{5}{6} ÷ (1 - \frac{2}{3}) ◯ \frac{5}{6} × (1 - \frac{2}{3})$
$\frac{3}{5} ÷ (1 - \frac{1}{10}) ◯ \frac{2}{9} ÷ (1 - \frac{1}{10})$
$\frac{3}{4} ÷ (1 + \frac{1}{8}) ◯ \frac{3}{4} × (1 + \frac{1}{8})$
$\frac{7}{8} ÷ (1 + \frac{1}{7}) ◯ \frac{7}{8} + \frac{7}{8} ÷ \frac{1}{7}$
$\frac{5}{6} ÷ (1 - \frac{2}{3}) ◯ \frac{5}{6} × (1 - \frac{2}{3})$
$\frac{3}{5} ÷ (1 - \frac{1}{10}) ◯ \frac{2}{9} ÷ (1 - \frac{1}{10})$
答案
3. $<$ $<$ $>$ $>$
如果$\frac{1}{2}○2=\frac{1}{2}×\frac{1}{3}$,$\frac{1}{3}○4=\frac{1}{3}×\frac{1}{4}×\frac{1}{5}×\frac{1}{6}$,那么$\frac{\frac{1}{4}○4}{\frac{1}{5}○5}$的值是(
18
)。答案
【思维提升】18
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