1. 直接写出得数。(20☆)
$4×\frac{5}{8}=$ $7×\frac{5}{14}=$ $20×\frac{1}{2}=$ $8×\frac{4}{9}=$
$3×\frac{5}{21}=$ $12×\frac{7}{36}=$ $18×\frac{4}{9}=$ $12×\frac{5}{6}=$
$\frac{3}{8}×\frac{4}{5}=$ $\frac{1}{9}×\frac{1}{5}=$ $\frac{1}{8}×\frac{4}{7}=$ $\frac{5}{3}×\frac{7}{6}=$
$\frac{1}{4}×\frac{1}{4}=$ $\frac{3}{7}×\frac{3}{5}=$ $\frac{2}{7}×\frac{4}{13}=$ $\frac{1}{3}×\frac{2}{9}=$
$\frac{4}{3}×\frac{9}{14}=$ $\frac{7}{9}×\frac{3}{4}=$ $\frac{2}{5}×\frac{15}{8}=$ $\frac{2}{3}×\frac{9}{10}=$
$4×\frac{5}{8}=$ $7×\frac{5}{14}=$ $20×\frac{1}{2}=$ $8×\frac{4}{9}=$
$3×\frac{5}{21}=$ $12×\frac{7}{36}=$ $18×\frac{4}{9}=$ $12×\frac{5}{6}=$
$\frac{3}{8}×\frac{4}{5}=$ $\frac{1}{9}×\frac{1}{5}=$ $\frac{1}{8}×\frac{4}{7}=$ $\frac{5}{3}×\frac{7}{6}=$
$\frac{1}{4}×\frac{1}{4}=$ $\frac{3}{7}×\frac{3}{5}=$ $\frac{2}{7}×\frac{4}{13}=$ $\frac{1}{3}×\frac{2}{9}=$
$\frac{4}{3}×\frac{9}{14}=$ $\frac{7}{9}×\frac{3}{4}=$ $\frac{2}{5}×\frac{15}{8}=$ $\frac{2}{3}×\frac{9}{10}=$
答案
1. $\frac{5}{2}$ $\frac{5}{2}$ 10 $3\frac{5}{9}$
$\frac{5}{7}$ $\frac{7}{3}$ 8 10
$\frac{3}{10}$ $\frac{1}{45}$ $\frac{1}{14}$ $\frac{35}{18}$
$\frac{1}{16}$ $\frac{9}{35}$ $\frac{8}{91}$ $\frac{2}{27}$
$\frac{6}{7}$ $\frac{7}{12}$ $\frac{3}{4}$ $\frac{3}{5}$
$\frac{5}{7}$ $\frac{7}{3}$ 8 10
$\frac{3}{10}$ $\frac{1}{45}$ $\frac{1}{14}$ $\frac{35}{18}$
$\frac{1}{16}$ $\frac{9}{35}$ $\frac{8}{91}$ $\frac{2}{27}$
$\frac{6}{7}$ $\frac{7}{12}$ $\frac{3}{4}$ $\frac{3}{5}$
2. 看图计算。(9☆)
(1)
$\frac{1}{2}×\frac{1}{2}=\frac{(\quad)}{(\quad)}$
(2)
$\frac{2}{3}×\frac{4}{5}=\frac{(\quad)}{(\quad)}$
(3)
$\frac{3}{4}×\frac{3}{4}=\frac{(\quad)}{(\quad)}$
(1)
(2)
(3)
答案
2. (1)$\frac{1}{4}$ (2)$\frac{8}{15}$ (3)$\frac{9}{16}$
3. 根据算式涂一涂,再计算。(12☆)
(1)
$\frac{1}{2}×\frac{3}{5}=\frac{(\quad)}{(\quad)}$
(2)
$\frac{3}{4}×\frac{1}{5}=\frac{(\quad)}{(\quad)}$
(3)
$\frac{1}{4}×\frac{2}{5}=\frac{(\quad)}{(\quad)}$
(1)
$\frac{1}{2}×\frac{3}{5}=\frac{(\quad)}{(\quad)}$
(2)
$\frac{3}{4}×\frac{1}{5}=\frac{(\quad)}{(\quad)}$
(3)
$\frac{1}{4}×\frac{2}{5}=\frac{(\quad)}{(\quad)}$
答案
3. (1)(涂法合理即可)
(2)(涂法合理即可)
(3)(涂法合理即可)
4. 填一填。(9☆)
$\frac{1}{5}$ t 的$\frac{2}{3}$是(
$\frac{3}{8}$ L 的$\frac{3}{4}$是(
$\frac{5}{6}$ m² 的$\frac{3}{5}$是(
$\frac{4}{5}$小时的$\frac{1}{2}$是(
$\frac{9}{4}$ mm 的$\frac{2}{3}$是(
5 cm 的$\frac{13}{15}$是(
$\frac{3}{10}$ g 的$\frac{5}{9}$是(
$\frac{7}{5}$ kg 的$\frac{10}{7}$是(
$\frac{5}{9}$ dm 的$\frac{9}{10}$是(
用时:分钟
共得:☆/50 ☆
$\frac{1}{5}$ t 的$\frac{2}{3}$是(
$\frac{2}{15}$
)t$\frac{3}{8}$ L 的$\frac{3}{4}$是(
$\frac{9}{32}$
)L$\frac{5}{6}$ m² 的$\frac{3}{5}$是(
$\frac{1}{2}$
)m²$\frac{4}{5}$小时的$\frac{1}{2}$是(
$\frac{2}{5}$
)小时$\frac{9}{4}$ mm 的$\frac{2}{3}$是(
$\frac{3}{2}$
)mm5 cm 的$\frac{13}{15}$是(
$\frac{13}{3}$
)cm$\frac{3}{10}$ g 的$\frac{5}{9}$是(
$\frac{1}{6}$
)g$\frac{7}{5}$ kg 的$\frac{10}{7}$是(
2
)kg$\frac{5}{9}$ dm 的$\frac{9}{10}$是(
$\frac{1}{2}$
)dm用时:分钟
共得:☆/50 ☆
答案
4. $\frac{2}{15}$ $\frac{9}{32}$ $\frac{1}{2}$
$\frac{2}{5}$ $\frac{3}{2}$ $\frac{13}{3}$
$\frac{1}{6}$ 2 $\frac{1}{2}$
$\frac{2}{5}$ $\frac{3}{2}$ $\frac{13}{3}$
$\frac{1}{6}$ 2 $\frac{1}{2}$
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