《2025年文墨小学数学口算心算天天练五年级下册人教版》

② $\frac{5}{8} + \frac{5}{12} =$

答案： $\frac{5}{8} = \frac{15}{24}$，$\frac{5}{12} = \frac{10}{24}$，$\frac{15}{24} + \frac{10}{24} = \frac{25}{24}$

③ $6 - \frac{7}{24} =$

答案： $6 = \frac{144}{24}$，$\frac{144}{24} - \frac{7}{24} = \frac{137}{24}$

⑤ $24 × \frac{7}{8} =$

答案： $24 ÷ 8 = 3$，$3 × 7 = 21$

⑥ $\frac{9}{10} × \frac{11}{18} =$

答案： $\frac{9 × 11}{10 × 18} = \frac{99}{180} = \frac{11}{20}$

⑦ $\frac{1}{2} × 140 =$

答案： $140 × \frac{1}{2} = 70$

⑩ $5 - \frac{7}{19} =$

答案： $5 = \frac{95}{19}$，$\frac{95}{19} - \frac{7}{19} = \frac{88}{19}$

⑮ $\frac{9}{14} × 28 =$

答案： $28 ÷ 14 = 2$，$2 × 9 = 18$

㉑ $\frac{1}{3} + \frac{2}{5} =$

答案： $\frac{1}{3} = \frac{5}{15}$，$\frac{2}{5} = \frac{6}{15}$，$\frac{5}{15} + \frac{6}{15} = \frac{11}{15}$

㉒ $\frac{5}{6} + 12 =$

答案： $12 = \frac{72}{6}$，$\frac{72}{6} + \frac{5}{6} = \frac{77}{6}$