1. 直接写出得数。
实际用时:分钟
$\frac{2}{3}÷\frac{1}{5}=$
$\frac{4}{5}÷\frac{1}{5}=$
$\frac{5}{9}÷\frac{4}{9}=$
$0÷\frac{1}{5}=$
$14÷\frac{2}{3}=$
$\frac{34}{39}÷\frac{1}{39}=$
$35÷\frac{7}{8}=$
$\frac{2}{5}÷4=$
$\frac{5}{18}÷\frac{5}{18}=$
$\frac{1}{5}÷\frac{2}{3}=$
$\frac{4}{7}÷\frac{7}{4}=$
$\frac{8}{9}÷\frac{10}{27}=$
$\frac{2}{5}÷\frac{1}{5}=$
$\frac{1}{2}÷5=$
$\frac{9}{4}÷\frac{3}{2}=$
$\frac{5}{6}÷\frac{5}{8}=$
$\frac{3}{5}÷\frac{1}{7}=$
$\frac{5}{7}÷\frac{1}{3}=$
$\frac{5}{6}÷6=$
$\frac{3}{8}÷\frac{7}{3}=$
$\frac{5}{7}÷\frac{5}{7}=$
$\frac{10}{9}÷\frac{10}{7}=$
$\frac{1}{3}÷\frac{1}{4}=$
$\frac{2}{11}÷\frac{1}{9}=$
实际用时:分钟
$\frac{2}{3}÷\frac{1}{5}=$
$\frac{4}{5}÷\frac{1}{5}=$
$\frac{5}{9}÷\frac{4}{9}=$
$0÷\frac{1}{5}=$
$14÷\frac{2}{3}=$
$\frac{34}{39}÷\frac{1}{39}=$
$35÷\frac{7}{8}=$
$\frac{2}{5}÷4=$
$\frac{5}{18}÷\frac{5}{18}=$
$\frac{1}{5}÷\frac{2}{3}=$
$\frac{4}{7}÷\frac{7}{4}=$
$\frac{8}{9}÷\frac{10}{27}=$
$\frac{2}{5}÷\frac{1}{5}=$
$\frac{1}{2}÷5=$
$\frac{9}{4}÷\frac{3}{2}=$
$\frac{5}{6}÷\frac{5}{8}=$
$\frac{3}{5}÷\frac{1}{7}=$
$\frac{5}{7}÷\frac{1}{3}=$
$\frac{5}{6}÷6=$
$\frac{3}{8}÷\frac{7}{3}=$
$\frac{5}{7}÷\frac{5}{7}=$
$\frac{10}{9}÷\frac{10}{7}=$
$\frac{1}{3}÷\frac{1}{4}=$
$\frac{2}{11}÷\frac{1}{9}=$
答案
1. $\frac{10}{3}$ $4$ $\frac{5}{4}$ $0$
$21$ $34$ $40$ $\frac{1}{10}$
$1$ $\frac{3}{10}$ $\frac{16}{49}$ $\frac{12}{5}$
$2$ $\frac{1}{10}$ $\frac{3}{2}$ $\frac{4}{3}$
$\frac{21}{5}$ $\frac{15}{7}$ $\frac{5}{36}$ $\frac{9}{56}$
$1$ $\frac{7}{9}$ $\frac{4}{3}$ $\frac{18}{11}$
$21$ $34$ $40$ $\frac{1}{10}$
$1$ $\frac{3}{10}$ $\frac{16}{49}$ $\frac{12}{5}$
$2$ $\frac{1}{10}$ $\frac{3}{2}$ $\frac{4}{3}$
$\frac{21}{5}$ $\frac{15}{7}$ $\frac{5}{36}$ $\frac{9}{56}$
$1$ $\frac{7}{9}$ $\frac{4}{3}$ $\frac{18}{11}$
2. 计算下面各题。
$\frac{11}{21}+\frac{7}{9}+\frac{10}{21}$
$8-\frac{7}{13}-\frac{6}{13}$
$\frac{7}{16}+\frac{5}{2}-\frac{7}{8}$
$\frac{11}{21}+\frac{7}{9}+\frac{10}{21}$
$8-\frac{7}{13}-\frac{6}{13}$
$\frac{7}{16}+\frac{5}{2}-\frac{7}{8}$
答案
2. $\frac{16}{9}$ $7$ $\frac{33}{16}$
3. 不计算,在$◯$里填上“>”“<”或“=”。
$\frac{1}{9} ÷ 3 ◯ \frac{1}{9}$
$\frac{5}{13} ÷ \frac{5}{4} ◯ \frac{5}{13} × \frac{5}{4}$
$\frac{7}{15} ÷ \frac{1}{3} ◯ \frac{7}{15} × \frac{3}{2}$
$\frac{1}{8} ÷ 5 ◯ \frac{1}{8} × \frac{1}{5}$
$\frac{6}{5} ÷ \frac{4}{5} ◯ \frac{6}{5} × \frac{4}{5}$
$\frac{7}{8} ÷ 4 ◯ \frac{7}{8} × 4$
$\frac{1}{9} ÷ 3 ◯ \frac{1}{9}$
$\frac{5}{13} ÷ \frac{5}{4} ◯ \frac{5}{13} × \frac{5}{4}$
$\frac{7}{15} ÷ \frac{1}{3} ◯ \frac{7}{15} × \frac{3}{2}$
$\frac{1}{8} ÷ 5 ◯ \frac{1}{8} × \frac{1}{5}$
$\frac{6}{5} ÷ \frac{4}{5} ◯ \frac{6}{5} × \frac{4}{5}$
$\frac{7}{8} ÷ 4 ◯ \frac{7}{8} × 4$
答案
3. $<$ $<$ $>$
$=$ $>$ $<$
$=$ $>$ $<$
已知$p\odot q=(p+q)÷(p-q)$。比如$27\odot18=(27+18)÷(27-18)=45÷9=5$。那么$12\odot(30\odot24)$的值是多少?
答案
【思维提升】7
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