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1 口算。
$\frac{6}{7} ÷ 3 =$
$1.5 × \frac{1}{3} =$
$\frac{1}{3} × \frac{9}{10} =$
$3 ÷ \frac{3}{11} =$
$\frac{3}{5} × 4.5 =$
$\frac{1}{3} ÷ \frac{9}{10} =$
$2.4 ÷ \frac{4}{15} =$
$\frac{2}{3} × 9 =$
$75\% × 16 =$
$54 ÷ \frac{9}{10} =$
$\frac{3}{7} ÷ \frac{9}{7} =$
$\frac{1}{3} ÷ 50\% =$
$\frac{6}{7} ÷ 3 =$
$1.5 × \frac{1}{3} =$
$\frac{1}{3} × \frac{9}{10} =$
$3 ÷ \frac{3}{11} =$
$\frac{3}{5} × 4.5 =$
$\frac{1}{3} ÷ \frac{9}{10} =$
$2.4 ÷ \frac{4}{15} =$
$\frac{2}{3} × 9 =$
$75\% × 16 =$
$54 ÷ \frac{9}{10} =$
$\frac{3}{7} ÷ \frac{9}{7} =$
$\frac{1}{3} ÷ 50\% =$
答案
1.$\frac{2}{7}$，$0.5$，$\frac{3}{10}$，$11$，$2.7$，$\frac{10}{27}$，$9$，$6$，$12$，$60$，$\frac{1}{3}$，$\frac{2}{3}$
2 计算下面各题,能简便的要简便计算。
$48×(\dfrac{3}{16}×\dfrac{5}{12})$
$(\dfrac{5}{7}-\dfrac{1}{3}+\dfrac{16}{21})×42$
$56×\dfrac{7}{8}÷56×\dfrac{7}{8}$
$101×\dfrac{99}{102}$
$\dfrac{3}{4}×49\%+0.51×0.75$
$(\dfrac{2}{121}+\dfrac{1}{36})×121×36$
$48×(\dfrac{3}{16}×\dfrac{5}{12})$
$(\dfrac{5}{7}-\dfrac{1}{3}+\dfrac{16}{21})×42$
$56×\dfrac{7}{8}÷56×\dfrac{7}{8}$
$101×\dfrac{99}{102}$
$\dfrac{3}{4}×49\%+0.51×0.75$
$(\dfrac{2}{121}+\dfrac{1}{36})×121×36$
答案
2.$\frac{15}{4}$，$48$，$\frac{49}{64}$，$98\frac{1}{34}$，$\frac{3}{4}$，$193$
3 一种服装原价105元，现在降价$\frac{2}{7}$，降价了多少元？
答案
3. 30元
4 一种服装原价105元，现在降价$\frac{2}{7}$，现在的售价是多少元？
答案
4. 75元
5 一种服装现价105元，降价了$\frac{2}{7}$，原价是多少元？
答案
5. 147元
