-25. Oblicz:
a) 1/6 + 2/5
b) 8/9 - 5/6
c) 1 1/5+8 1/7
D) 4 7/10 + 2 1/3
E) 4 1/5- 7/10
F) 6 1/8- 2 3/4
G) 10 2/3-6 7/9
H) 9 3/8-2 5/6

Prosze szybko



Odpowiedź :

Cześć ;-)

Od a) do d)

[tex]\frac{1}{6}+\frac{2}{5}=\frac{5}{30}+\frac{12}{30}=\frac{17}{30}\\\\\frac{8}{9}-\frac{5}{6}=\frac{16}{18}-\frac{15}{18}=\frac{1}{18}\\\\1\frac{1}{5}+8\frac{1}{7}=1\frac{7}{35}+8\frac{5}{35}=9\frac{12}{35}\\\\4\frac{7}{10}+2\frac{1}{3}=4\frac{21}{30}+2\frac{10}{30}=6\frac{31}{30}=7\frac{1}{30}[/tex]

Od e) do h)

[tex]4\frac{1}{5}-\frac{7}{10}=4\frac{2}{10}-\frac{7}{10}=3\frac{12}{10}-\frac{7}{10}=3\frac{5}{10}=3\frac{1}{2}\\\\6\frac{1}{8}-2\frac{3}{4}=6\frac{1}{8}-2\frac{6}{8}=5\frac{9}{8}-2\frac{6}{8}=3\frac{3}{8}\\\\10\frac{2}{3}-6\frac{7}{9}=10\frac{6}{9}-6\frac{7}{9}=9\frac{15}{9}-6\frac{7}{9}=3\frac{8}{9}\\\\9\frac{3}{8}-2\frac{5}{6}=9\frac{9}{24}-2\frac{20}{24}=8\frac{33}{24}-2\frac{20}{24}=6\frac{13}{24}[/tex]

Pozdrawiam!

Odpowiedź:

a) 1/6 + 2/5= 5/30 + 12/30= 17/30

b) 8/9- 5/6= 16/18- 15/18= 1/18

c)1 i 1/5 + 8 i 1/7= 1 i 7/35 + 8 i 5/35= 9 i 12/35

d)  4 i 7/10 + 2 i 1/3= 4 i  21/30 + 2  i 10/30= 6 i 31/30= 7 i 1/30

e)  4 i 1/5 - 7/10= 4 i 2/10- 7/10= 3 i 12/10- 7/10= 3 i 5/10= 3 i 1/2

f)  6 i 1/8 -2 i 3/4= 6 i 1/8- 2 i 6/8= 5 i 9/8- 2 i 6/8= 3 i 3/8

g)  10 i 2/3 - 6 i 7/9= 10 i 6/9- 6 i 7/9=9 i 15/9- 6 i 7/9= 3 i 8/9

h)  9 i 3/8 - 2 i 5/6= 9 i 9/24- 2 i 20/24= 8 i 33/24- 2 i 20/24= 6 i 13/24

Szczegółowe wyjaśnienie: