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Proszę na teraz(dam naj) ​



Proszę Na Terazdam Naj class=

Odpowiedź :

AstraySpirit2308

Cześć!

c)

[tex]\frac{8}{9}-\frac{2}{5}=\frac{8\cdot5}{9\cdot5}-\frac{2\cdot9}{5\cdot9}=\frac{40}{45}-\frac{18}{45}=\frac{22}{45}\\\\\frac{7}{8}-\frac{4}{5}=\frac{7\cdot5}{8\cdot5}-\frac{4\cdot8}{5\cdot8}=\frac{35}{40}-\frac{32}{40}=\frac{3}{40}\\\\4\frac{5}{6}-\frac{1}{4}=4\frac{5\cdot2}{6\cdot2}-\frac{1\cdot3}{4\cdot3}=4\frac{10}{12}-\frac{3}{12}=4\frac{7}{12}[/tex]

d)

[tex]6\frac{8}{9}-1\frac{1}{2}=6\frac{8\cdot2}{9\cdot2}-1\frac{1\cdot9}{2\cdot9}=6\frac{16}{18}-1\frac{9}{18}=5\frac{7}{18}\\\\8\frac{5}{7}-3\frac{2}{5}=8\frac{5\cdot5}{7\cdot5}-3\frac{2\cdot7}{5\cdot7}=8\frac{25}{35}-3\frac{14}{35}=5\frac{11}{35}\\\\4\frac{1}{4}-4\frac{1}{6}=4\frac{1\cdot3}{4\cdot3}-4\frac{1\cdot2}{6\cdot2}=4\frac{3}{12}-4\frac{2}{12}=\frac{1}{12}[/tex]

Tojamiki

Odpowiedź:

c)

8/9 - 2/5 = 40/45 - 18/45 = 22/45

7/8 - 4/5 = 35/40 - 32/40 = 3/40

4 5/6 - 1/4 = 4 10/12 - 3/12 = 4 7/12

d)

6 8/9 - 1 1/2 = 6 16/18 - 1 9/118 = 5 7/18

8 5/7 - 3 2/5 = 8 25/35 - 3 14/35 = 5 11/35

4 1/4 - 4 1/6 = 4 3/12 - 4 2/12 = 1/12

Szczegółowe wyjaśnienie:

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