Vở bài tập Toán lớp 5 trang 14 Bài 4: Phân số thập phân – Kết nối tri thức

a) $\frac{1}{2}=\frac{1\times \mathrm{.....}}{2\times \mathrm{.....}}=\frac{\mathrm{.....}}{10}$

b) $\frac{63}{300}=\frac{63:\mathrm{.....}}{300:\mathrm{.....}}=\frac{\mathrm{.....}}{100}$

c) $\frac{12}{25}=\frac{12\times \mathrm{.....}}{25\times \mathrm{.....}}=\frac{\mathrm{.....}}{100}$

d) $\frac{145}{5000}=\frac{145:\mathrm{.....}}{5000:\mathrm{.....}}=\frac{\mathrm{.....}}{1000}$

a) $\frac{1}{2}=\frac{1\times 5}{2\times 5}=\frac{5}{10}$

b) $\frac{63}{300}=\frac{63:3}{300:3}=\frac{21}{100}$

c) $\frac{12}{25}=\frac{12\times 4}{25\times 4}=\frac{48}{100}$

d) $\frac{145}{5000}=\frac{145:5}{5000:5}=\frac{29}{1000}$

$\frac{72}{80}=\mathrm{................................}$

$\frac{444}{400}=\mathrm{................................}$

$\frac{27}{25}=\mathrm{................................}$

$\frac{100}{125}=\mathrm{................................}$

$\frac{1}{4}=\mathrm{................................}$

$\frac{5}{8}=\mathrm{................................}$

$\frac{72}{80}=\frac{72:8}{80:8}=\frac{9}{10}$

$\frac{444}{400}=\frac{444:4}{400:4}=\frac{111}{100}$

$\frac{27}{25}=\frac{27\times 4}{25\times 4}=\frac{108}{100}$

$\frac{100}{125}=\frac{100\times 8}{125\times 8}=\frac{800}{1000}$

$\frac{1}{4}=\frac{1\times 25}{4\times 25}=\frac{25}{100}$

$\frac{5}{8}=\frac{5\times 125}{8\times 125}=\frac{625}{1000}$