搜索
1. 看图计算。
(
(
$\frac{3}{4}$
)×($\frac{1}{3}$
)= ($\frac{1}{4}$
)
答案：
$\frac{3}{4} × \frac{1}{3} = \frac{1}{4}$
2. 口算。
$\frac{3}{8}+\frac{1}{6}=$
$\frac{2}{3}×\frac{5}{11}=$
$\frac{5}{6}×\frac{3}{4}=$
$\frac{1}{5}×10=$
$\frac{7}{10}×\frac{5}{14}=$
$\frac{5}{6}×12=$
$\frac{1}{4}×\frac{2}{5}=$
$\frac{3}{4}-\frac{2}{5}=$
$\frac{3}{4}+\frac{1}{8}=$
$\frac{4}{7}×\frac{1}{3}=$
$\frac{3}{5}×\frac{2}{3}=$
$12×\frac{5}{8}=$
$\frac{7}{10}×\frac{5}{7}=$
$10×\frac{3}{5}=$
$\frac{3}{4}-\frac{1}{3}=$
$\frac{5}{12}×4=$
$\frac{3}{4}×\frac{2}{7}=$
$\frac{4}{9}×\frac{3}{4}=$
$\frac{3}{8}+\frac{1}{6}=$
$\frac{13}{24}$
$\frac{2}{3}×\frac{5}{11}=$
$\frac{10}{33}$
$\frac{5}{6}×\frac{3}{4}=$
$\frac{5}{8}$
$\frac{1}{5}×10=$
2
$\frac{7}{10}×\frac{5}{14}=$
$\frac{1}{4}$
$\frac{5}{6}×12=$
10
$\frac{1}{4}×\frac{2}{5}=$
$\frac{1}{10}$
$\frac{3}{4}-\frac{2}{5}=$
$\frac{7}{20}$
$\frac{3}{4}+\frac{1}{8}=$
$\frac{7}{8}$
$\frac{4}{7}×\frac{1}{3}=$
$\frac{4}{21}$
$\frac{3}{5}×\frac{2}{3}=$
$\frac{2}{5}$
$12×\frac{5}{8}=$
$\frac{15}{2}$
$\frac{7}{10}×\frac{5}{7}=$
$\frac{1}{2}$
$10×\frac{3}{5}=$
6
$\frac{3}{4}-\frac{1}{3}=$
$\frac{5}{12}$
$\frac{5}{12}×4=$
$\frac{5}{3}$
$\frac{3}{4}×\frac{2}{7}=$
$\frac{3}{14}$
$\frac{4}{9}×\frac{3}{4}=$
$\frac{1}{3}$
答案：
解析：本题考查分数的加减乘除基本运算。
答案：
$\frac{3}{8} + \frac{1}{6} = \frac{9}{24} + \frac{4}{24} = \frac{13}{24}$
$\frac{2}{3} × \frac{5}{11} = \frac{10}{33}$
$\frac{5}{6} × \frac{3}{4} = \frac{15}{24} = \frac{5}{8}$
$\frac{1}{5} × 10 = 2$
$\frac{7}{10} × \frac{5}{14} = \frac{35}{140} = \frac{1}{2} × \frac{1}{2} = \frac{1}{4} × 2 = \frac{1}{2} × \frac{1}{1} =\frac{1}{2} ÷ 2 = \frac{1}{4} × \frac{2}{2} = \frac{1}{2} × \frac{1}{2}= \frac{1}{4} ×( \frac{5}{5}× \frac{7}{7}× \frac{2}{2})= \frac{35}{70} =\frac{1}{2}$（交叉约分后计算）$= \frac{1}{4} × 2 × \frac{1}{1}= \frac{1}{2}$（或直接约分计算）
$\frac{5}{6} × 12 = 10$
$\frac{1}{4} × \frac{2}{5} = \frac{2}{20} = \frac{1}{10}$
$\frac{3}{4} - \frac{2}{5} = \frac{15}{20} - \frac{8}{20} = \frac{7}{20}$
$\frac{3}{4} + \frac{1}{8} = \frac{6}{8} + \frac{1}{8} = \frac{7}{8}$
$\frac{4}{7} × \frac{1}{3} = \frac{4}{21}$
$\frac{3}{5} × \frac{2}{3} = \frac{6}{15} = \frac{2}{5}$
$12 × \frac{5}{8} = \frac{60}{8} = \frac{15}{2} = 7.5$（或写为$\frac{15}{2}$）
$\frac{7}{10} × \frac{5}{7} = \frac{35}{70} = \frac{1}{2}$
$10 × \frac{3}{5} = 6$
$\frac{3}{4} - \frac{1}{3} = \frac{9}{12} - \frac{4}{12} = \frac{5}{12}$
$\frac{5}{12} × 4 = \frac{20}{12} = \frac{5}{3}$（或写为$1\frac{2}{3}$）
$\frac{3}{4} × \frac{2}{7} = \frac{6}{28} = \frac{3}{14}$
$\frac{4}{9} × \frac{3}{4} = \frac{12}{36} = \frac{1}{3}$
答案：
$\frac{3}{8} + \frac{1}{6} = \frac{9}{24} + \frac{4}{24} = \frac{13}{24}$
$\frac{2}{3} × \frac{5}{11} = \frac{10}{33}$
$\frac{5}{6} × \frac{3}{4} = \frac{15}{24} = \frac{5}{8}$
$\frac{1}{5} × 10 = 2$
$\frac{7}{10} × \frac{5}{14} = \frac{35}{140} = \frac{1}{2} × \frac{1}{2} = \frac{1}{4} × 2 = \frac{1}{2} × \frac{1}{1} =\frac{1}{2} ÷ 2 = \frac{1}{4} × \frac{2}{2} = \frac{1}{2} × \frac{1}{2}= \frac{1}{4} ×( \frac{5}{5}× \frac{7}{7}× \frac{2}{2})= \frac{35}{70} =\frac{1}{2}$（交叉约分后计算）$= \frac{1}{4} × 2 × \frac{1}{1}= \frac{1}{2}$（或直接约分计算）
$\frac{5}{6} × 12 = 10$
$\frac{1}{4} × \frac{2}{5} = \frac{2}{20} = \frac{1}{10}$
$\frac{3}{4} - \frac{2}{5} = \frac{15}{20} - \frac{8}{20} = \frac{7}{20}$
$\frac{3}{4} + \frac{1}{8} = \frac{6}{8} + \frac{1}{8} = \frac{7}{8}$
$\frac{4}{7} × \frac{1}{3} = \frac{4}{21}$
$\frac{3}{5} × \frac{2}{3} = \frac{6}{15} = \frac{2}{5}$
$12 × \frac{5}{8} = \frac{60}{8} = \frac{15}{2} = 7.5$（或写为$\frac{15}{2}$）
$\frac{7}{10} × \frac{5}{7} = \frac{35}{70} = \frac{1}{2}$
$10 × \frac{3}{5} = 6$
$\frac{3}{4} - \frac{1}{3} = \frac{9}{12} - \frac{4}{12} = \frac{5}{12}$
$\frac{5}{12} × 4 = \frac{20}{12} = \frac{5}{3}$（或写为$1\frac{2}{3}$）
$\frac{3}{4} × \frac{2}{7} = \frac{6}{28} = \frac{3}{14}$
$\frac{4}{9} × \frac{3}{4} = \frac{12}{36} = \frac{1}{3}$
查看更多完整答案，请扫码查看
