1. 直接写出得数。(24☆)
$\frac{7}{18}×\frac{9}{14}=$
$0.75×\frac{4}{15}=$
$\frac{11}{24}×\frac{8}{33}=$
$\frac{13}{25}×\frac{10}{26}=$
$2.6×\frac{5}{13}=$
$\frac{5}{12}×2.4=$
$\frac{9}{16}×\frac{4}{27}=$
$3.2×\frac{5}{8}=$
$0.6×\frac{5}{9}=$
$\frac{15}{28}×\frac{7}{10}=$
$1.25×\frac{4}{5}=$
$\frac{21}{32}×\frac{8}{7}=$
$\frac{4}{9}×2.7=$
$\frac{6}{13}×\frac{26}{15}=$
$4.5×\frac{2}{9}=$
$\frac{19}{24}×\frac{8}{19}=$
$\frac{4}{9}×\frac{3}{8}=$
$3.5×\frac{2}{7}=$
$\frac{13}{20}×\frac{10}{13}=$
$2.4×\frac{5}{6}=$
$\frac{5}{11}×2.2=$
$\frac{16}{21}×\frac{7}{8}=$
$1.8×\frac{5}{9}=$
$\frac{5}{8}×\frac{4}{15}=$
$\frac{7}{18}×\frac{9}{14}=$
$0.75×\frac{4}{15}=$
$\frac{11}{24}×\frac{8}{33}=$
$\frac{13}{25}×\frac{10}{26}=$
$2.6×\frac{5}{13}=$
$\frac{5}{12}×2.4=$
$\frac{9}{16}×\frac{4}{27}=$
$3.2×\frac{5}{8}=$
$0.6×\frac{5}{9}=$
$\frac{15}{28}×\frac{7}{10}=$
$1.25×\frac{4}{5}=$
$\frac{21}{32}×\frac{8}{7}=$
$\frac{4}{9}×2.7=$
$\frac{6}{13}×\frac{26}{15}=$
$4.5×\frac{2}{9}=$
$\frac{19}{24}×\frac{8}{19}=$
$\frac{4}{9}×\frac{3}{8}=$
$3.5×\frac{2}{7}=$
$\frac{13}{20}×\frac{10}{13}=$
$2.4×\frac{5}{6}=$
$\frac{5}{11}×2.2=$
$\frac{16}{21}×\frac{7}{8}=$
$1.8×\frac{5}{9}=$
$\frac{5}{8}×\frac{4}{15}=$
答案
1. $\frac{1}{4}$
$\frac{1}{5}$
$\frac{1}{9}$
$\frac{1}{5}$
$1$
$1$
$\frac{1}{12}$
$2$
$\frac{1}{3}$
$\frac{3}{8}$
$1$
$\frac{3}{4}$
$\frac{6}{5}$
$\frac{4}{5}$
$1$
$\frac{1}{3}$
$\frac{1}{6}$
$1$
$\frac{1}{2}$
$2$
$1$
$\frac{2}{3}$
$1$
$\frac{1}{6}$
$\frac{1}{5}$
$\frac{1}{9}$
$\frac{1}{5}$
$1$
$1$
$\frac{1}{12}$
$2$
$\frac{1}{3}$
$\frac{3}{8}$
$1$
$\frac{3}{4}$
$\frac{6}{5}$
$\frac{4}{5}$
$1$
$\frac{1}{3}$
$\frac{1}{6}$
$1$
$\frac{1}{2}$
$2$
$1$
$\frac{2}{3}$
$1$
$\frac{1}{6}$
2. 涂一涂,算一算。(12☆)
(1)
$\frac{2}{3} × \frac{1}{5} =$
(2)
$\frac{1}{2} × \frac{3}{5} =$
(1)
(2)
答案
2. (1)
(2)
3. 求下列图形的面积。(单位:dm)(8☆)
(1)
(2)
(1)
(2)
答案
3. (1) $\frac{8}{9}×\frac{3}{5}=\frac{8}{15}(\mathrm{dm}^2)$
(2) $\frac{8}{9}×\frac{2}{3}=\frac{16}{27}(\mathrm{dm}^2)$
(2) $\frac{8}{9}×\frac{2}{3}=\frac{16}{27}(\mathrm{dm}^2)$
(1)小明和小军在一起折星星,折一个星星要用$\frac{1}{6}$张纸。小明折了9个,小军折了14个。他们一共用了多少张纸?
答案
4. (1) $\frac{1}{6}×9+\frac{1}{6}×14=\frac{23}{6}$(张)
答:他们一共用了$\frac{23}{6}$张纸。
答:他们一共用了$\frac{23}{6}$张纸。
(2)一辆汽车油箱的容量是 50 升。为了长途旅行,车主加的油比油箱容量的$\frac{4}{5}$多8升。车主这次一共加了多少升油?
答案
(2) $50×\frac{4}{5}+8=48$(升)
答:车主这次一共加了 48 升油。
答:车主这次一共加了 48 升油。
登录