Zojda2340
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Oblicz:
Klasa 6
Proszę o pomoc ​



Oblicz Klasa 6 Proszę O Pomoc class=

Odpowiedź :

Odpowiedź:

Szczegółowe wyjaśnienie:

a) 3/5 + 7/10 = 6/10 + 7/10 = 13/10 = 1 3/10

4/15 - 4/15 = 0

11/30 + 1/6 = 11/30 + 5/30 = 16/30 = 8/15

b) 2 9/16 - 1 1/4 =2 9/16 - 1 4/16 = 1 5/16

12 2/3 + 1 3/4 = 12 8/12 + 1 9/12 = 13 17/12 = 14 5/12

8 1/8 - 2/3 = 8 3/24 - 16/24 = 7 27/24 - 16/24 = 7 11/24

c) 6 1/4 - 3 5/6 = 6 3/12 - 3 10/12 = 5 15/12 - 3 10/12 = 2 5/12

7 1/6 + 6 1/8 = 7 4/24 + 6 3/24 = 13 7/24

6 1/3 - 3 5/6 = 6 2/6 - 3 5/6 = 5 8/6 - 3 5/6 = 2 3/6 = 2 1/2

d) 3/8 + 5/6 - 7/12 = 9/24 + 20/24 - 14/24 = (9 + 20 - 14)/24 = 15/24

2 1/6 - 1 1/2 + 1/8 = 13/6 - 3/2 + 1/8 = 52/24 - 36/24 + 3/24 = (55-36)/24 = 19/24

5 1/14 - 2 1/4 - 1 3/7 = 71/14 - 9/4 - 10/7 = 142/28 - 63/28 - 40/28

= (142 - 103)/28 = 39/28 = 1 11/28

Magda

Odpowiedź:

[tex]a)\\\\\frac{3}{5}+\frac{7}{10}=\frac{6}{10}+\frac{7}{10}=\frac{13}{10}=1\frac{3}{10}\\\\\frac{4}{15}-\frac{4}{15}=0\\\\\frac{11}{30}+\frac{1}{6}=\frac{11}{30}+\frac{5}{30}=\frac{16}{30}=\frac{8}{15}[/tex]

[tex]b)\\\\2\frac{9}{16}-1\frac{1}{4}=2\frac{9}{16}-1\frac{4}{16}=1\frac{5}{16}\\\\12\frac{2}{3}+1\frac{3}{4}=12\frac{8}{12}+1\frac{9}{12}=13\frac{17}{12}=14\frac{5}{12}\\\\8\frac{1}{8}-\frac{2}{3}=8\frac{3}{24}-\frac{16}{24}=7\frac{27}{24}-\frac{16}{24}=7\frac{11}{24}[/tex]

[tex]c)\\\\6\frac{1}{4}-3\frac{5}{6}=6\frac{3}{12}-3\frac{10}{12}=5\frac{15}{12}-3\frac{10}{12}=2\frac{5}{12}\\\\7\frac{1}{6}+6\frac{1}{8}=7\frac{4}{24}+6\frac{3}{24}=13\frac{7}{24}\\\\6\frac{1}{3}-3\frac{5}{6}=6\frac{2}{6}-3\frac{5}{6}=5\frac{8}{6}-3\frac{5}{6}=2\frac{3}{6}=2\frac{1}{2}[/tex]

[tex]d)\\\\\frac{3}{8}+\frac{5}{6}-\frac{7}{12}=\frac{9}{24}+\frac{20}{24}-\frac{14}{24}=\frac{15}{24}=\frac{5}{8}\\\\2\frac{1}{6}-1\frac{1}{2}+\frac{1}{8}=2\frac{4}{24}-1\frac{12}{24}+\frac{3}{24}=1\frac{28}{24}-1\frac{12}{24}+\frac{3}{24}=\frac{19}{24}\\\\5\frac{1}{14}-2\frac{1}{4}-1\frac{3}{7}=5\frac{2}{28}-2\frac{7}{28}-1\frac{12}{28}=4\frac{30}{28}-2\frac{7}{28}-1\frac{12}{28}=2\frac{23}{28}-1\frac{12}{28}= 1\frac{11}{28}[/tex]

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