Question

математика 5 сынып 138 бет 377-379 есеп

Answer 1

$\displaystyle \frac{14}{26}=\frac{7*2}{13*2}=\frac{7}{13}\\ \\ \frac{18}{24}=\frac{3*6}{4*6}=\frac{3}{4}\\ \\\frac{25}{15}=\frac{15+9}{15}=1\frac{9}{15}=1\frac{3*3}{3*5}=1\frac{3}{5}\\\\\frac{25}{35}=\frac{5*5}{7*5}=\frac{5}{7}\\\\\frac{81}{108}=\frac{3*27}{4*27}=\frac{3}{4}\\\\ \\ \frac{30}{42}=\frac{5*6}{7*6}=\frac{5}{7}\\\\\frac{33}{39}=\frac{11*3}{13*3}=\frac{11}{13}\\\\\frac{45}{51}=\frac{15*3}{17*3}=\frac{15}{17}\\\\\frac{12}{60}=\frac{1*12}{5*12}=\frac{1}{5}$

$\displaystyle \frac{50}{100}=\frac{1*50}{2*50}=\frac{1}{2}$

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№378

$\displaystyle \frac{16+26}{26}=1\frac{16}{26}=1\frac{8*2}{13*2}=1\frac{8}{13}\\\\\frac{35}{77}=\frac{5*7}{11*7}=\frac{5}{11}\\\\\frac{48}{60}=\frac{4*12}{5*12}=\frac{4}{5}\\\\\frac{72}{96}=\frac{3*24}{4*24}=\frac{3}{4}\\\\\frac{56}{70}=\frac{4*14}{5*14}=\frac{4}{5}$

$\displaystyle \frac{72}{90}=\frac{4*18}{5*18}=\frac{4}{5}\\\\ \frac{60}{105}=\frac{4*15}{7*15}=\frac{4}{7}\\\\\frac{45}{150}=\frac{3*15}{10*15}=\frac{3}{10}\\\\\frac{84}{120}=\frac{7*12}{10*12}=\frac{7}{10}\\\\\frac{96}{100}=\frac{24*4}{25*4}=\frac{24}{25}$

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№ 379

$\displaystyle \frac{5}{9}=\frac{15}{27}=\frac{25}{45}=\frac{40}{72}$  объяснение: $\displaystyle \frac{5}{9}=\frac{3*5}{3*9}=\frac{5*5}{5*9}=\frac{8*5}{8*9}$

$\displaystyle \frac{7}{6}=\frac{21}{18}=\frac{35}{30}=\frac{49}{42}$  объяснение: $\displaystyle \frac{7}{6}=\frac{3*7}{3*6}=\frac{5*7}{5*6}=\frac{7*7}{7*6}$

$\displaystyle \frac{3}{4}=\frac{18}{24}=\frac{24}{32}=\frac{36}{48}$  объяснение: $\displaystyle \frac{3}{4}=\frac{6*3}{6*4}=\frac{8*3}{8*4}=\frac{12*3}{12*4}$

$\displaystyle \frac{2}{3}=\frac{10}{15}=\frac{14}{21}=\frac{18}{27}$  объяснение: $\displaystyle \frac{2}{3}=\frac{5*2}{5*3}=\frac{7*2}{7*3}=\frac{9*2}{9*3}$