1. 直接写出得数。(24☆)
$35×\frac{2}{35}=$
$\frac{2}{5}÷2=$
$\frac{1}{4}×4.8=$
$\frac{9}{19}÷9=$
$13.5×\frac{2}{9}=$
$9÷\frac{9}{20}=$
$16.5×\frac{1}{5}=$
$\frac{4}{13}÷2=$
$\frac{8}{21}÷\frac{32}{7}=$
$25×\frac{2}{25}=$
$3÷\frac{1}{6}=$
$\frac{1}{2}÷\frac{4}{9}=$
$\frac{12}{35}÷\frac{18}{7}=$
$\frac{1}{92}×4=$
$9÷\frac{1}{2}=$
$\frac{9}{32}÷\frac{27}{4}=$
$\frac{4}{3}÷2=$
$\frac{4}{63}÷\frac{16}{9}=$
$\frac{3}{28}÷\frac{15}{7}=$
$\frac{5}{44}×2=$
$\frac{6}{19}÷3=$
$\frac{18}{35}÷\frac{6}{5}=$
$\frac{1}{3}÷\frac{2}{9}=$
$9÷\frac{9}{19}=$
$35×\frac{2}{35}=$
$\frac{2}{5}÷2=$
$\frac{1}{4}×4.8=$
$\frac{9}{19}÷9=$
$13.5×\frac{2}{9}=$
$9÷\frac{9}{20}=$
$16.5×\frac{1}{5}=$
$\frac{4}{13}÷2=$
$\frac{8}{21}÷\frac{32}{7}=$
$25×\frac{2}{25}=$
$3÷\frac{1}{6}=$
$\frac{1}{2}÷\frac{4}{9}=$
$\frac{12}{35}÷\frac{18}{7}=$
$\frac{1}{92}×4=$
$9÷\frac{1}{2}=$
$\frac{9}{32}÷\frac{27}{4}=$
$\frac{4}{3}÷2=$
$\frac{4}{63}÷\frac{16}{9}=$
$\frac{3}{28}÷\frac{15}{7}=$
$\frac{5}{44}×2=$
$\frac{6}{19}÷3=$
$\frac{18}{35}÷\frac{6}{5}=$
$\frac{1}{3}÷\frac{2}{9}=$
$9÷\frac{9}{19}=$
答案
2 $\frac{1}{5}$ 1.2 $\frac{1}{19}$
3 20 3.3 $\frac{2}{13}$
$\frac{1}{12}$ 2 18 $\frac{9}{8}$
$\frac{2}{15}$ $\frac{1}{23}$ 18 $\frac{1}{24}$
$\frac{2}{3}$ $\frac{1}{28}$ $\frac{1}{20}$ $\frac{5}{22}$
$\frac{2}{19}$ $\frac{3}{7}$ $\frac{3}{2}$ 19
3 20 3.3 $\frac{2}{13}$
$\frac{1}{12}$ 2 18 $\frac{9}{8}$
$\frac{2}{15}$ $\frac{1}{23}$ 18 $\frac{1}{24}$
$\frac{2}{3}$ $\frac{1}{28}$ $\frac{1}{20}$ $\frac{5}{22}$
$\frac{2}{19}$ $\frac{3}{7}$ $\frac{3}{2}$ 19
2. 比大小。(12☆)
$\frac{5}{8} ÷ \frac{4}{5} ◯ \frac{5}{8} × \frac{4}{5}$
$\frac{4}{9} × \frac{3}{5} ◯ \frac{4}{9} ÷ \frac{5}{3}$
$\frac{8}{9} ÷ \frac{8}{3} ◯ \frac{8}{9} × \frac{8}{3}$
$\frac{15}{8} × \frac{4}{3} ◯ \frac{15}{8} ÷ \frac{4}{3}$
$\frac{2}{13} × \frac{1}{2} ◯ \frac{2}{13} ÷ \frac{1}{2}$
$\frac{4}{11} ÷ 2 ◯ \frac{4}{11} × 2$
$\frac{5}{8} ÷ \frac{4}{5} ◯ \frac{5}{8} × \frac{4}{5}$
$\frac{4}{9} × \frac{3}{5} ◯ \frac{4}{9} ÷ \frac{5}{3}$
$\frac{8}{9} ÷ \frac{8}{3} ◯ \frac{8}{9} × \frac{8}{3}$
$\frac{15}{8} × \frac{4}{3} ◯ \frac{15}{8} ÷ \frac{4}{3}$
$\frac{2}{13} × \frac{1}{2} ◯ \frac{2}{13} ÷ \frac{1}{2}$
$\frac{4}{11} ÷ 2 ◯ \frac{4}{11} × 2$
答案
> = <
> < <
> < <
3. 算一算,填一填。(12☆)
$2 ÷ \frac{6}{7}$
$\frac{10}{11}$
=
$\frac{4}{15}$
$\frac{6}{11}$
$\frac{12}{7}$ ÷ 6
=
$\frac{9}{13}$
$2 ÷ \frac{6}{7}$
$\frac{10}{11}$
$\frac{4}{15}$
$\frac{6}{11}$
$\frac{12}{7}$ ÷ 6
$\frac{9}{13}$
答案
$\frac{7}{3}$ $\frac{11}{5}$ $\frac{15}{2}$
$\frac{7}{11}$ 2 $\frac{21}{26}$
$\frac{7}{11}$ 2 $\frac{21}{26}$
4. 计算下面各题,能简算的要简算。(12☆)
$99×\dfrac{99}{100}$
$5×(\dfrac{2}{5}×\dfrac{3}{7})×7$
$34.8×\dfrac{3}{5}+65.2×\dfrac{3}{5}$
$99×\dfrac{99}{100}$
$5×(\dfrac{2}{5}×\dfrac{3}{7})×7$
$34.8×\dfrac{3}{5}+65.2×\dfrac{3}{5}$
答案
$98\frac{1}{100}$ 6 60
5. 面粉厂$\frac{2}{3}$小时可以加工面粉$\frac{8}{9}$t。(8☆)
(1)照这样计算,1小时可以加工面粉多少吨? (2)照这样计算,加工1 t面粉需要多少小时?
(1)照这样计算,1小时可以加工面粉多少吨? (2)照这样计算,加工1 t面粉需要多少小时?
答案
(1)$\frac{8}{9}÷\frac{2}{3}=\frac{4}{3}(\mathrm{t})$
答:1小时可以加工面粉$\frac{4}{3}$ t。
(2)$1÷\frac{4}{3}=\frac{3}{4}(\mathrm{小时})$
答:加工1 t面粉需要$\frac{3}{4}$小时。
答:1小时可以加工面粉$\frac{4}{3}$ t。
(2)$1÷\frac{4}{3}=\frac{3}{4}(\mathrm{小时})$
答:加工1 t面粉需要$\frac{3}{4}$小时。
登录