2025年文墨小学数学口算心算天天练五年级下册人教版


注:目前有些书本章节名称可能整理的还不是很完善,但都是按照顺序排列的,请同学们按照顺序仔细查找。练习册 2025年文墨小学数学口算心算天天练五年级下册人教版 答案主要是用来给同学们做完题方便对答案用的,请勿直接抄袭。



《2025年文墨小学数学口算心算天天练五年级下册人教版》

① $\frac{1}{3}÷2÷\frac{1}{3}$
答案: $\frac{1}{2}$
解析:$\frac{1}{3}÷2÷\frac{1}{3}=\frac{1}{3}×\frac{1}{2}×3=\frac{1}{2}$
② $\frac{2}{3}÷(1 - \frac{2}{3})$
答案: 2
解析:$\frac{2}{3}÷(1 - \frac{2}{3})=\frac{2}{3}÷\frac{1}{3}=2$
③ $\frac{1}{2}×\frac{4}{7}×\frac{7}{8}$
答案: $\frac{1}{4}$
解析:$\frac{1}{2}×\frac{4}{7}×\frac{7}{8}=\frac{1×4×7}{2×7×8}=\frac{4}{16}=\frac{1}{4}$
④ $\frac{1}{14}÷(\frac{3}{5}+\frac{2}{7})$
答案: $\frac{5}{154}$
解析:$\frac{1}{14}÷(\frac{3}{5}+\frac{2}{7})=\frac{1}{14}÷(\frac{21}{35}+\frac{10}{35})=\frac{1}{14}÷\frac{31}{35}=\frac{1}{14}×\frac{35}{31}=\frac{5}{62}$(注:原解析计算有误,$\frac{3}{5}+\frac{2}{7}=\frac{21+10}{35}=\frac{31}{35}$,$\frac{1}{14}×\frac{35}{31}=\frac{5}{62}$)
⑤ $6÷\frac{3}{8}-\frac{3}{8}÷6$
答案: $15\frac{15}{16}$
解析:$6÷\frac{3}{8}-\frac{3}{8}÷6=6×\frac{8}{3}-\frac{3}{8}×\frac{1}{6}=16 - \frac{1}{16}=15\frac{15}{16}$
⑥ $\frac{1}{4}×\frac{11}{4}+\frac{3}{4}÷\frac{4}{17}$
答案: $\frac{62}{16}$(即$\frac{31}{8}$)
解析:$\frac{1}{4}×\frac{11}{4}+\frac{3}{4}×\frac{17}{4}=\frac{11}{16}+\frac{51}{16}=\frac{62}{16}=\frac{31}{8}$
⑦ $\frac{12}{5}÷3÷\frac{12}{5}$
答案: $\frac{1}{3}$
解析:$\frac{12}{5}÷3÷\frac{12}{5}=\frac{12}{5}×\frac{1}{3}×\frac{5}{12}=\frac{1}{3}$
⑧ $96×\frac{1}{8}×\frac{5}{6}$
答案: 10
解析:$96×\frac{1}{8}×\frac{5}{6}=12×\frac{5}{6}=10$
⑨ $\frac{4}{5}÷8×\frac{5}{6}$
答案: $\frac{1}{12}$
解析:$\frac{4}{5}÷8×\frac{5}{6}=\frac{4}{5}×\frac{1}{8}×\frac{5}{6}=\frac{4×1×5}{5×8×6}=\frac{20}{240}=\frac{1}{12}$
⑩ $\frac{5}{18}×\frac{1}{4}×\frac{9}{10}$
答案: $\frac{1}{16}$
解析:$\frac{5}{18}×\frac{1}{4}×\frac{9}{10}=\frac{5×1×9}{18×4×10}=\frac{45}{720}=\frac{1}{16}$
⑪ $1 - \frac{1}{5}×\frac{3}{5}$
答案: $\frac{22}{25}$
解析:$1 - \frac{1}{5}×\frac{3}{5}=1 - \frac{3}{25}=\frac{22}{25}$
⑫ $(\frac{3}{4}-\frac{3}{5})÷\frac{3}{4}$
答案: $\frac{1}{5}$
解析:$(\frac{3}{4}-\frac{3}{5})÷\frac{3}{4}=(\frac{15}{20}-\frac{12}{20})×\frac{4}{3}=\frac{3}{20}×\frac{4}{3}=\frac{1}{5}$
⑬ $\frac{5}{6}÷\frac{5}{8}×\frac{1}{2}$
答案: $\frac{2}{3}$
解析:$\frac{5}{6}÷\frac{5}{8}×\frac{1}{2}=\frac{5}{6}×\frac{8}{5}×\frac{1}{2}=\frac{8}{12}=\frac{2}{3}$
⑭ $6÷\frac{3}{8}+\frac{3}{8}÷6$
答案: $16\frac{1}{16}$
解析:$6÷\frac{3}{8}+\frac{3}{8}÷6=16 + \frac{1}{16}=16\frac{1}{16}$
⑮ $\frac{1}{4}×\frac{1}{8}×32$
答案: 1
解析:$\frac{1}{4}×\frac{1}{8}×32=\frac{32}{32}=1$
⑯ $\frac{9}{7}-(\frac{4}{7}-\frac{10}{21})$
答案: $\frac{25}{21}$
解析:$\frac{9}{7}-\frac{4}{7}+\frac{10}{21}=\frac{5}{7}+\frac{10}{21}=\frac{15}{21}+\frac{10}{21}=\frac{25}{21}$
⑰ $\frac{4}{5}×3÷\frac{3}{10}$
答案: 8
解析:$\frac{4}{5}×3×\frac{10}{3}=\frac{4×10}{5}=8$
⑱ $\frac{5}{3}×\frac{11}{5}+\frac{4}{3}$
答案: 5
解析:$\frac{5}{3}×\frac{11}{5}+\frac{4}{3}=\frac{11}{3}+\frac{4}{3}=\frac{15}{3}=5$
⑲ $\frac{1}{3}÷\frac{1}{3}×\frac{5}{6}÷\frac{2}{3}$
答案: $\frac{5}{4}$
解析:$\frac{1}{3}×3×\frac{5}{6}×\frac{3}{2}=1×\frac{15}{12}=\frac{5}{4}$
⑳ $6×(\frac{1}{2}+\frac{2}{3})$
答案: 7
解析:$6×\frac{1}{2}+6×\frac{2}{3}=3 + 4=7$
㉑ $\frac{2}{5}÷\frac{3}{5}×\frac{1}{4}$
答案: $\frac{1}{6}$
解析:$\frac{2}{5}×\frac{5}{3}×\frac{1}{4}=\frac{2}{3}×\frac{1}{4}=\frac{1}{6}$
㉒ $12×\frac{5}{6}+\frac{3}{12}$
答案: $10\frac{1}{4}$
解析:$12×\frac{5}{6}+\frac{1}{4}=10 + \frac{1}{4}=10\frac{1}{4}$

查看更多完整答案,请扫码查看

关闭