Bài tập hàng ngày Toán lớp 4 Kết nối tri thức Bài 64. Phép chia phân số có đáp án

a) \(\frac{{12}}{{14}}:\frac{4}{3}\)

= \(\frac{{12}}{{14}} \times \frac{3}{4}\) = \(\frac{9}{{14}}\)

b) \(\frac{{18}}{{22}}:\frac{6}{5}\)

= \(\frac{{18}}{{22}} \times \frac{5}{6}\) = \(\frac{{15}}{{22}}\)

c) \(\frac{5}{3}:\frac{{10}}{7}\)

= \(\frac{5}{3} \times \frac{7}{{10}}\) = \(\frac{7}{6}\)

d) \(\frac{{14}}{{20}}:\frac{7}{4}\)

= \(\frac{{14}}{{20}} \times \frac{4}{7}\) = \(\frac{2}{5}\)

a) \(\frac{5}{{72}}:\frac{3}{8}:\frac{{16}}{9}\)

= \(\frac{5}{{72}} \times \frac{8}{3} \times \frac{9}{{16}}\)

= \(\frac{5}{{27}} \times \frac{9}{{16}}\)

= \(\frac{5}{{48}}\)

b) \(\frac{9}{{14}}:\frac{{18}}{{11}} \times \frac{{20}}{7}:\frac{5}{6}\)

= \(\frac{9}{{14}} \times \frac{{11}}{{18}} \times \frac{{20}}{7} \times \frac{6}{5}\)

= \(\frac{{11}}{{28}} \times \frac{{20}}{7} \times \frac{6}{5}\)

= \(\frac{{55}}{{49}} \times \frac{6}{5}\) = \(\frac{{66}}{{49}}\)