elo daje 20 pkt za to zadanie

[tex]a)\\\\\frac{2}{5}+.....=0,75\\\\.....=0,75-\frac{2}{5}= \frac{75}{}- 0,4=0,35\\\\b)\\\\1,65- .....=\frac{1}{4} \\\\.....= 1,65-\frac{1}{4} = 1 \frac{65}{100}-\frac{1}{4} = 1 \frac{13 }{20}-\frac{1}{4} = 1 \frac{13 }{20}-\frac{5}{20} =1\frac{8}{20} =1\frac{2}{5}[/tex]

[tex]c)\\\\ ....+\frac{9}{20}= 0,85\\\\.....=0,85-\frac{9}{20}=0,85-0,45=0,4[/tex]

Answer Link

Basetlaviz Basetlaviz · Answer 2

2.

a)

[tex]\frac{2}{5} = \frac{2\cdot2}{5\cdot2} = \frac{4}{10} = 0,4\\\\0,75-0,4 = 0,35 = \frac{35}{100} = \frac{7}{20}[/tex]

2/5 + 7/20 = 0,75

b)

[tex]1,65 = \frac{165}{100} =\frac{165:5}{100:5} = \frac{33}{20}\\\\\frac{33}{20}-\frac{1}{4} = \frac{33}{20}-\frac{5}{20} = \frac{28}{20} = \frac{7}{4}[/tex]

1,65 - 7/5 = 1/4

c)

[tex]0,85 = \frac{85}{100} = \frac{85:5}{100:5} = \frac{17}{20}\\\\\frac{17}{29}-\frac{9}{20} = \frac{8}{20} = \frac{2}{5}[/tex]

2/5 + 9/20 = 0,85