《2025年阳光同学暑假衔接五升六年级数学人教版》

2. 用简便方法计算。
$\frac {2}{15}×21×\frac {5}{14}$ $(\frac {1}{4}+\frac {1}{3})×24$ $\frac {7}{8}-\frac {5}{12}×\frac {7}{8}$

答案： 2. $1$ $14$ $\frac{49}{96}$

1. 在$\bigcirc$里填上“＞”“＜”或
$\frac {7}{8}×\frac {5}{9}\bigcirc \frac {5}{9}×\frac {7}{8}$ $(\frac {1}{9}+\frac {1}{16})×8\bigcirc \frac {1}{9}+\frac {1}{16}×8$
$\frac {5}{6}×\frac {1}{12}\bigcirc \frac {1}{4}$ $(\frac {7}{12}×\frac {5}{8})×\frac {3}{7}\bigcirc \frac {5}{8}×(\frac {7}{12}×\frac {3}{7})$
2. 计算下面各题,能简算的要简算。
$\frac {3}{4}×\frac {5}{7}×\frac {8}{9}$ $(\frac {1}{3}-\frac {1}{4}+\frac {1}{6})×12$ $17×\frac {4}{5}+\frac {4}{5}×13$
$\frac {4}{19}×25×\frac {3}{5}×19$ $(\frac {8}{9}+\frac {5}{6})×5.4$ $35×\frac {33}{34}$
3. (算法应用)一辆小货车一次可运货$\frac {25}{11}t$,5辆这样的小货车22次可运货多少吨？

答案： 1. $=$ $＞$ $＜$ $=$
2. $\frac{10}{21}$ $3$ $24$ $60$ $9.3$ $33\frac{33}{34}$
3. $\frac{25}{11} \times 5 \times 22 = 250(t)$

4. (思维拓展)用简便方法计算。
$\frac {28}{39}×\frac {11}{25}+\frac {14}{39}×\frac {28}{25}$ $(\frac {1}{3}+\frac {1}{5})×3×5$

答案： 4. $\frac{28}{39}$ $8$