《2025年小学学霸天天计算六年级上册苏教版》

1. $\frac{2}{9} × \frac{3}{4} = $$\frac{1}{6}$ $20 ÷ \frac{4}{15} = $75 $\frac{21}{8} × \frac{4}{7} = $$\frac{3}{2}$
$\frac{7}{12} ÷ \frac{7}{4} = $$\frac{1}{3}$ $\frac{5}{14} + \frac{8}{21} = $$\frac{31}{42}$ $\frac{8}{15} × 24 = $$\frac{64}{5}$
$\frac{7}{4} × \frac{5}{14} = $$\frac{5}{8}$ $\frac{12}{11} ÷ \frac{3}{8} = $$\frac{32}{11}$ $\frac{9}{4} - \frac{5}{12} = $$\frac{11}{6}$
$\frac{5}{21} ÷ \frac{3}{5} = $$\frac{25}{63}$ $\frac{9}{14} × \frac{3}{4} = $$\frac{27}{56}$ $\frac{8}{21} ÷ \frac{16}{7} = $$\frac{1}{6}$
$\frac{8}{15} + \frac{4}{9} = $$\frac{44}{45}$ $30 ÷ \frac{3}{8} = $80 $\frac{3}{4} × 50 = $$\frac{75}{2}$
$\frac{9}{16} ÷ \frac{3}{10} = $$\frac{15}{8}$ $\frac{12}{13} × \frac{3}{2} = $$\frac{18}{13}$ $\frac{5}{4} - \frac{5}{8} = $$\frac{5}{8}$
$\frac{15}{28} × \frac{7}{3} = $$\frac{5}{4}$ $\frac{5}{6} ÷ \frac{10}{7} = $$\frac{7}{12}$ $\frac{1}{12} × \frac{16}{9} = $$\frac{4}{27}$
$\frac{5}{24} ÷ \frac{5}{24} = $1 $15 × \frac{8}{9} = $$\frac{40}{3}$ $\frac{9}{10} ÷ \frac{1}{5} = $$\frac{9}{2}$
$\frac{2}{3} + \frac{2}{21} = $$\frac{16}{21}$ $\frac{5}{6} × \frac{11}{10} = $$\frac{11}{12}$ $\frac{4}{15} ÷ \frac{8}{5} = $$\frac{1}{6}$
$\frac{13}{8} × \frac{16}{39} = $$\frac{2}{3}$ $\frac{4}{27} ÷ \frac{8}{9} = $$\frac{1}{6}$ $\frac{3}{16} × 12 = $$\frac{9}{4}$

答案： 1. $\frac{1}{6}$ 75 $\frac{3}{2}$
$\frac{1}{3}$ $\frac{31}{42}$ $\frac{64}{5}$
$\frac{5}{8}$ $\frac{32}{11}$ $\frac{11}{6}$
$\frac{25}{63}$ $\frac{27}{56}$ $\frac{1}{6}$
$\frac{44}{45}$ 80 $\frac{75}{2}$
$\frac{15}{8}$ $\frac{18}{13}$ $\frac{5}{8}$
$\frac{5}{4}$ $\frac{7}{12}$ $\frac{4}{27}$
1 $\frac{40}{3}$ $\frac{9}{2}$
$\frac{16}{21}$ $\frac{11}{12}$ $\frac{1}{6}$
$\frac{2}{3}$ $\frac{1}{6}$ $\frac{9}{4}$

2. 小欣上学时从家到学校用了8分钟,放学时从学校沿原路返回家用了10分钟。她上学用的时间比放学少百分之几？她上学时的速度比放学快了百分之几？

答案： 20% 25%