1. 直接写出得数。
$\frac{17}{24} × 8 =$
$\frac{6}{7} × \frac{2}{15} =$
$\frac{5}{8} + \frac{1}{4} =$
$1 - \frac{2}{15} × \frac{5}{2} =$
$18 × \frac{3}{8} =$
$\frac{9}{16} × \frac{2}{3} =$
$\frac{5}{8} × \frac{2}{5} =$
$\frac{1}{2} × 2 + \frac{1}{7} =$
$\frac{4}{7} × 7.7 =$
$\frac{4}{7} - \frac{3}{7} =$
$\frac{5}{6} × 10 =$
$\frac{10}{11} - 0 × \frac{7}{12} =$
$0.9 × \frac{7}{18} =$
$\frac{7}{12} × \frac{3}{14} =$
$\frac{1}{5} × \frac{5}{11} =$
$\frac{5}{9} × ( \frac{2}{15} + \frac{1}{15} ) =$

$\frac{17}{24} × 8 =\frac{17}{3}$
$\frac{6}{7} × \frac{2}{15} =\frac{4}{35}$
$\frac{5}{8} + \frac{1}{4} =\frac{7}{8}$
$1 - \frac{2}{15} × \frac{5}{2} =\frac{2}{3}$
$18 × \frac{3}{8} =\frac{27}{4}$
$\frac{9}{16} × \frac{2}{3} =\frac{3}{8}$
$\frac{5}{8} × \frac{2}{5} =\frac{1}{4}$
$\frac{1}{2} × 2 + \frac{1}{7} =\frac{8}{7}$
$\frac{4}{7} × 7.7 =4.4$
$\frac{4}{7} - \frac{3}{7} =\frac{1}{7}$
$\frac{5}{6} × 10 =\frac{25}{3}$
$\frac{10}{11} - 0 × \frac{7}{12} =\frac{10}{11}$
$0.9 × \frac{7}{18} =\frac{7}{20}$
$\frac{7}{12} × \frac{3}{14} =\frac{1}{8}$
$\frac{1}{5} × \frac{5}{11} =\frac{1}{11}$
$\frac{5}{9} × ( \frac{2}{15} + \frac{1}{15} ) =\frac{1}{9}$

2.连一连。

$\frac{3}{4}×\frac{2}{3}+1$
$=\frac{1}{2}+1$
$=\frac{3}{2}$
$\frac{1}{6}×(2+3)$
$=\frac{1}{6}×5$
$=\frac{5}{6}$
$3×\frac{5}{6}×\frac{1}{10}$
$=\frac{5}{2}×\frac{1}{10}$
$=\frac{1}{4}$
$12×\frac{5}{6}×2$
$=10×2$
$=20$
连线对应：
$\frac{3}{4}×\frac{2}{3}+1$ 连接 $\frac{3}{2}$
$\frac{1}{6}×(2+3)$ 连接 $\frac{5}{6}$
$3×\frac{5}{6}×\frac{1}{10}$ 连接 $\frac{1}{4}$
$12×\frac{5}{6}×2$ 连接 $20$

3.在○里填上“＞”“＜”或“=”。
$2.4×\frac{3}{8}$ ○ $2.7×\frac{1}{3}$
$16×\frac{3}{8}$ ○ $\frac{3}{7}×6+\frac{3}{7}$
$1-\frac{3}{7}$ ○ $\frac{5}{7}-\frac{2}{7}$
$\frac{5}{36}×3$ ○ $\frac{1}{3}+\frac{1}{12}$
$\frac{1}{2}+\frac{1}{4}+\frac{1}{6}$ ○ $2×\frac{11}{25}$
$\frac{5}{37}+\frac{7}{37}$ ○ $\frac{1}{6}×2$

$2.4×\frac{3}{8}=0.9$
$2.7×\frac{1}{3}=0.9$
$2.4×\frac{3}{8} \boxed{=} 2.7×\frac{1}{3}$
$16×\frac{3}{8}=6$
$\frac{3}{7}×6+\frac{3}{7}=\frac{3}{7}×7=3$
$16×\frac{3}{8} \boxed{＞} \frac{3}{7}×6+\frac{3}{7}$
$1-\frac{3}{7}=\frac{4}{7}$
$\frac{5}{7}-\frac{2}{7}=\frac{3}{7}$
$1-\frac{3}{7} \boxed{＞} \frac{5}{7}-\frac{2}{7}$
$\frac{5}{36}×3=\frac{5}{12}$
$\frac{1}{3}+\frac{1}{12}=\frac{5}{12}$
$\frac{5}{36}×3 \boxed{=} \frac{1}{3}+\frac{1}{12}$
$\frac{1}{2}+\frac{1}{4}+\frac{1}{6}=\frac{11}{12}$
$2×\frac{11}{25}=\frac{22}{25}$
$\frac{11}{12}＞\frac{22}{25}$
$\frac{1}{2}+\frac{1}{4}+\frac{1}{6} \boxed{＞} 2×\frac{11}{25}$
$\frac{5}{37}+\frac{7}{37}=\frac{12}{37}$
$\frac{1}{6}×2=\frac{1}{3}$
$\frac{12}{37}＜\frac{1}{3}$
$\frac{5}{37}+\frac{7}{37} \boxed{＜} \frac{1}{6}×2$

根据下面的算式，给题目补充合适的条件。
李爷爷的果园里种了 560 棵梨树，。李爷爷种了多少棵桃树？
列式计算：$560×(1+\dfrac{1}{8})$。
反思 我错了（）道题。
自我评价：

补充条件：桃树的棵数比梨树多$\frac{1}{8}$。
$560×(1+\frac{1}{8})$
$=560×\frac{9}{8}$
$=630$（棵）
答：李爷爷种了630棵桃树。