《2025年速算天地数学口算心算六年级上册苏教版》

$\frac{1}{7} ÷ \frac{1}{4} = $$\frac{4}{7}$
$14 × \frac{3}{7} = $6
$\frac{2}{5} ÷ \frac{1}{2} = $$\frac{4}{5}$
$8 × \frac{1}{4} = $2
$\frac{3}{4} + \frac{1}{8} = $$\frac{7}{8}$
$6 × \frac{1}{3} = $2
$\frac{5}{6} - \frac{1}{3} = $$\frac{1}{2}$
$18 × \frac{1}{4} = $$\frac{9}{2}$
$\frac{1}{2} + \frac{1}{3} = $$\frac{5}{6}$
$\frac{1}{4} × \frac{2}{3} = $$\frac{1}{6}$
$\frac{1}{4} + \frac{1}{3} = $$\frac{7}{12}$
$\frac{1}{5} × \frac{15}{7} = $$\frac{3}{7}$
$\frac{5}{12} - \frac{1}{6} = $$\frac{1}{4}$
$2 × \frac{5}{3} = $$\frac{10}{3}$
$\frac{7}{12} - \frac{1}{4} = $$\frac{1}{3}$
$24 × \frac{5}{6} = $20
$\frac{7}{12} + \frac{1}{4} = $$\frac{5}{6}$
$\frac{4}{9} × \frac{3}{4} = $$\frac{1}{3}$
$\frac{2}{3} - \frac{1}{6} = $$\frac{1}{2}$
$2 × \frac{1}{6} = $$\frac{1}{3}$

答案： $\frac{1}{7} ÷ \frac{1}{4} = \frac{1}{7}×4 = \frac{4}{7}$
$14 × \frac{3}{7} = 2×3 = 6$
$\frac{2}{5} ÷ \frac{1}{2} = \frac{2}{5}×2 = \frac{4}{5}$
$8 × \frac{1}{4} = 2×1 = 2$
$\frac{3}{4} + \frac{1}{8} = \frac{6}{8} + \frac{1}{8} = \frac{7}{8}$
$6 × \frac{1}{3} = 2×1 = 2$
$\frac{5}{6} - \frac{1}{3} = \frac{5}{6} - \frac{2}{6} = \frac{3}{6} = \frac{1}{2}$
$18 × \frac{1}{4} = \frac{18}{4} = \frac{9}{2}$
$\frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6}$
$\frac{1}{4} × \frac{2}{3} = \frac{1×2}{4×3} = \frac{2}{12} = \frac{1}{6}$
$\frac{1}{4} + \frac{1}{3} = \frac{3}{12} + \frac{4}{12} = \frac{7}{12}$
$\frac{1}{5} × \frac{15}{7} = \frac{1×15}{5×7} = \frac{15}{35} = \frac{3}{7}$
$\frac{5}{12} - \frac{1}{6} = \frac{5}{12} - \frac{2}{12} = \frac{3}{12} = \frac{1}{4}$
$2 × \frac{5}{3} = \frac{10}{3}$
$\frac{7}{12} - \frac{1}{4} = \frac{7}{12} - \frac{3}{12} = \frac{4}{12} = \frac{1}{3}$
$24 × \frac{5}{6} = 4×5 = 20$
$\frac{7}{12} + \frac{1}{4} = \frac{7}{12} + \frac{3}{12} = \frac{10}{12} = \frac{5}{6}$
$\frac{4}{9} × \frac{3}{4} = \frac{4×3}{9×4} = \frac{12}{36} = \frac{1}{3}$
$\frac{2}{3} - \frac{1}{6} = \frac{4}{6} - \frac{1}{6} = \frac{3}{6} = \frac{1}{2}$
$2 × \frac{1}{6} = \frac{2}{6} = \frac{1}{3}$