Odpowiedź:
j) 1,8
k) [tex]\frac{35}{72}[/tex]
Wzory użyte:
[tex]x = \frac{10 * x}{10}[/tex]
[tex]\frac{a}{b} : \frac{c}{d} = \frac{a}{b} * \frac{d}{c}[/tex]
Szczegółowe wyjaśnienie:
j) [tex]\frac{3}{7} * 4,2 = \frac{3}{7} * 4\frac{2}{10} = \frac{3}{7} * \frac{42}{10} = \frac{3}{1} * \frac{6}{10} = \frac{18}{10} = 1,8[/tex]
k) [tex]1\frac{1}{6} : 2,4 = \frac{7}{6} : \frac{24}{10} = \frac{7}{6} * \frac{10}{24} = \frac{7}{3} * \frac{5}{24} = \frac{35}{72}[/tex]
j) 3/7 • 4,2= 3/7 • 42/10 = 3/7 • 21/5 = 3/1 • 3/5 = 9/5 = 1 4/5 =1,8
k) 1 1/6 : 2,4 = 7/6 : 24/10 = 7/6 : 12/5 = 7/6 • 5/12 = 35/72
Liczę na naj:)
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Verified answer
Odpowiedź:
j) 1,8
k) [tex]\frac{35}{72}[/tex]
Wzory użyte:
[tex]x = \frac{10 * x}{10}[/tex]
[tex]\frac{a}{b} : \frac{c}{d} = \frac{a}{b} * \frac{d}{c}[/tex]
Szczegółowe wyjaśnienie:
j) [tex]\frac{3}{7} * 4,2 = \frac{3}{7} * 4\frac{2}{10} = \frac{3}{7} * \frac{42}{10} = \frac{3}{1} * \frac{6}{10} = \frac{18}{10} = 1,8[/tex]
k) [tex]1\frac{1}{6} : 2,4 = \frac{7}{6} : \frac{24}{10} = \frac{7}{6} * \frac{10}{24} = \frac{7}{3} * \frac{5}{24} = \frac{35}{72}[/tex]
j) 3/7 • 4,2= 3/7 • 42/10 = 3/7 • 21/5 = 3/1 • 3/5 = 9/5 = 1 4/5 =1,8
k) 1 1/6 : 2,4 = 7/6 : 24/10 = 7/6 : 12/5 = 7/6 • 5/12 = 35/72
Liczę na naj:)