(1)$\frac{3}{4} \times \frac{10}{3}$

(2)$\frac{3}{5} \times \frac{15}{2}$

(3)$\frac{27}{4} \times \frac{4}{3}$

(4)$\frac{21}{10} \times \frac{35}{12}$

(5)$\frac{6}{7} \times \frac{4}{21}$

(6)$\frac{2}{3} \times \frac{1}{3}$

(7)$\frac{2}{9} \times \frac{3}{10}$

(8)$\frac{1}{10} \times \frac{35}{16}$

(9)$\frac{8}{3} \times \frac{1}{12}$

(10)$\frac{2}{3} \times \frac{12}{5}$

こたえ s0503a

(1) $\frac{5}{2}$ (2) $\frac{9}{2}$ (3) $9$ (4) $\frac{49}{8}$ (5) $\frac{8}{49}$ (6) $\frac{2}{9}$ (7) $\frac{1}{15}$ (8) $\frac{7}{32}$ (9) $\frac{2}{9}$ (10) $\frac{8}{5}$ (11) $\frac{16}{27}$ (12) $\frac{5}{3}$ (13) $\frac{1}{9}$ (14) $\frac{5}{6}$ (15) $\frac{40}{49}$ (16) $\frac{25}{56}$ (17) $\frac{1}{3}$ (18) $\frac{2}{5}$ (19) $\frac{16}{7}$ (20) $\frac{2}{9}$