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2.在○里填上“＞”“＜”或“=”。
$\frac{7}{12} × 3 ◯ \frac{7}{12}$
$\frac{8}{9} × \frac{1}{2} ◯ \frac{8}{9}$
$\frac{7}{15} × 1 ◯ \frac{7}{15}$
$\frac{4}{5} ÷ 5 ◯ \frac{4}{5}$
$\frac{3}{7} ÷ \frac{1}{2} ◯ \frac{3}{7}$
$\frac{5}{8} ÷ \frac{5}{4} ◯ \frac{3}{8}$
$\frac{6}{7} × \frac{2}{3} ◯ \frac{2}{3}$
$\frac{1}{5} × 5 ◯ \frac{7}{8} ÷ \frac{7}{8}$
$\frac{3}{4} × 0 ◯ \frac{3}{4}$
$\frac{7}{12} × 3 ◯ \frac{7}{12}$
$\frac{8}{9} × \frac{1}{2} ◯ \frac{8}{9}$
$\frac{7}{15} × 1 ◯ \frac{7}{15}$
$\frac{4}{5} ÷ 5 ◯ \frac{4}{5}$
$\frac{3}{7} ÷ \frac{1}{2} ◯ \frac{3}{7}$
$\frac{5}{8} ÷ \frac{5}{4} ◯ \frac{3}{8}$
$\frac{6}{7} × \frac{2}{3} ◯ \frac{2}{3}$
$\frac{1}{5} × 5 ◯ \frac{7}{8} ÷ \frac{7}{8}$
$\frac{3}{4} × 0 ◯ \frac{3}{4}$
答案
$\frac{7}{12} × 3 ＞ \frac{7}{12}$
$\frac{8}{9} × \frac{1}{2} ＜ \frac{8}{9}$
$\frac{7}{15} × 1 = \frac{7}{15}$
$\frac{4}{5} ÷ 5 ＜ \frac{4}{5}$
$\frac{3}{7} ÷ \frac{1}{2} ＞ \frac{3}{7}$
$\frac{5}{8} ÷ \frac{5}{4} ＞ \frac{3}{8}$
$\frac{6}{7} × \frac{2}{3} ＜ \frac{2}{3}$
$\frac{1}{5} × 5 = \frac{7}{8} ÷ \frac{7}{8}$
$\frac{3}{4} × 0 ＜ \frac{3}{4}$
$\frac{8}{9} × \frac{1}{2} ＜ \frac{8}{9}$
$\frac{7}{15} × 1 = \frac{7}{15}$
$\frac{4}{5} ÷ 5 ＜ \frac{4}{5}$
$\frac{3}{7} ÷ \frac{1}{2} ＞ \frac{3}{7}$
$\frac{5}{8} ÷ \frac{5}{4} ＞ \frac{3}{8}$
$\frac{6}{7} × \frac{2}{3} ＜ \frac{2}{3}$
$\frac{1}{5} × 5 = \frac{7}{8} ÷ \frac{7}{8}$
$\frac{3}{4} × 0 ＜ \frac{3}{4}$
3.直接写得数。
$\frac{7}{12}×9=$
$\frac{7}{15}×\frac{3}{7}=$
$\frac{3}{8}×0.16=$
$\frac{3}{18}÷3=$
$14×\frac{5}{7}=$
$3.5×\frac{2}{5}=$
$\frac{2}{3}×\frac{3}{2}=$
$\frac{5}{8}÷2=$
$\frac{3}{7}÷\frac{3}{2}=$
$\frac{8}{9}×0=$
$4.2÷\frac{7}{6}=$
$36÷\frac{9}{5}=$
$\frac{7}{12}×9=$
$\frac{7}{15}×\frac{3}{7}=$
$\frac{3}{8}×0.16=$
$\frac{3}{18}÷3=$
$14×\frac{5}{7}=$
$3.5×\frac{2}{5}=$
$\frac{2}{3}×\frac{3}{2}=$
$\frac{5}{8}÷2=$
$\frac{3}{7}÷\frac{3}{2}=$
$\frac{8}{9}×0=$
$4.2÷\frac{7}{6}=$
$36÷\frac{9}{5}=$
答案
$\frac{7}{12}×9=\frac{21}{4}$
$\frac{7}{15}×\frac{3}{7}=\frac{1}{5}$
$\frac{3}{8}×0.16=0.06$
$\frac{3}{18}÷3=\frac{1}{18}$
$14×\frac{5}{7}=10$
$3.5×\frac{2}{5}=1.4$
$\frac{2}{3}×\frac{3}{2}=1$
$\frac{5}{8}÷2=\frac{5}{16}$
$\frac{3}{7}÷\frac{3}{2}=\frac{2}{7}$
$\frac{8}{9}×0=0$
$4.2÷\frac{7}{6}=3.6$
$36÷\frac{9}{5}=20$
$\frac{7}{15}×\frac{3}{7}=\frac{1}{5}$
$\frac{3}{8}×0.16=0.06$
$\frac{3}{18}÷3=\frac{1}{18}$
$14×\frac{5}{7}=10$
$3.5×\frac{2}{5}=1.4$
$\frac{2}{3}×\frac{3}{2}=1$
$\frac{5}{8}÷2=\frac{5}{16}$
$\frac{3}{7}÷\frac{3}{2}=\frac{2}{7}$
$\frac{8}{9}×0=0$
$4.2÷\frac{7}{6}=3.6$
$36÷\frac{9}{5}=20$
4. 计算下面各题。
$1 - \frac{9}{16} × \frac{8}{15}$
$\frac{2}{3} ÷ \frac{5}{6} ÷ \frac{4}{5}$
$\frac{8}{9} × \frac{1}{4} × \frac{3}{8}$
$3 ÷ \frac{3}{5} - \frac{3}{5} ÷ 3$
$( \frac{3}{4} - \frac{1}{8} ) ÷ \frac{5}{12}$
$\frac{2}{3} + 8 × ( \frac{7}{8} - \frac{5}{6} )$
$1 - \frac{9}{16} × \frac{8}{15}$
$\frac{2}{3} ÷ \frac{5}{6} ÷ \frac{4}{5}$
$\frac{8}{9} × \frac{1}{4} × \frac{3}{8}$
$3 ÷ \frac{3}{5} - \frac{3}{5} ÷ 3$
$( \frac{3}{4} - \frac{1}{8} ) ÷ \frac{5}{12}$
$\frac{2}{3} + 8 × ( \frac{7}{8} - \frac{5}{6} )$
答案
$1 - \frac{9}{16} × \frac{8}{15}$
$=1 - \frac{3}{10}$
$=\frac{7}{10}$
$\frac{2}{3} ÷ \frac{5}{6} ÷ \frac{4}{5}$
$=\frac{2}{3} × \frac{6}{5} × \frac{5}{4}$
$=1$
$\frac{8}{9} × \frac{1}{4} × \frac{3}{8}$
$=\frac{2}{9} × \frac{3}{8}$
$=\frac{1}{12}$
$3 ÷ \frac{3}{5} - \frac{3}{5} ÷ 3$
$=5 - \frac{1}{5}$
$=\frac{24}{5}$
$( \frac{3}{4} - \frac{1}{8} ) ÷ \frac{5}{12}$
$=\frac{5}{8} × \frac{12}{5}$
$=\frac{3}{2}$
$\frac{2}{3} + 8 × ( \frac{7}{8} - \frac{5}{6} )$
$=\frac{2}{3} + 8×\frac{1}{24}$
$=\frac{2}{3} + \frac{1}{3}$
$=1$
$=1 - \frac{3}{10}$
$=\frac{7}{10}$
$\frac{2}{3} ÷ \frac{5}{6} ÷ \frac{4}{5}$
$=\frac{2}{3} × \frac{6}{5} × \frac{5}{4}$
$=1$
$\frac{8}{9} × \frac{1}{4} × \frac{3}{8}$
$=\frac{2}{9} × \frac{3}{8}$
$=\frac{1}{12}$
$3 ÷ \frac{3}{5} - \frac{3}{5} ÷ 3$
$=5 - \frac{1}{5}$
$=\frac{24}{5}$
$( \frac{3}{4} - \frac{1}{8} ) ÷ \frac{5}{12}$
$=\frac{5}{8} × \frac{12}{5}$
$=\frac{3}{2}$
$\frac{2}{3} + 8 × ( \frac{7}{8} - \frac{5}{6} )$
$=\frac{2}{3} + 8×\frac{1}{24}$
$=\frac{2}{3} + \frac{1}{3}$
$=1$
