4.c
5/1000=0,005
35/1000=0,035
235/1000=0,235
2016/10^3=2016/1000=2,016
143/10^4=143/10000=0,0143
2574/10^4=2574/10000=0,2574
18/10000=0,0018
5.a
[tex]2 \frac{11}{10} = 2 \times 10 + 11 = \frac{31}{10} = 3.1[/tex]
[tex]7 \frac{1}{10^{3} } = \frac{7 \times 1000 + 1}{1000} = \frac{7001}{1000} = 7.001[/tex]
[tex]5 \frac{214}{10 ^{4} } = \frac{5 \times 10000 + 214}{10000} = \frac{50214}{10000} = 5.0214 [/tex]
[tex]12 \frac{3}{10^{5} } = \frac{12 \times 100000 + 3}{100000} = \frac{1200003}{100000} = 12.00003[/tex]
[tex]1 \frac{435}{100} = \frac{1 \times 100 + 435}{100} = \frac{535}{100} = 5.35[/tex]
b. 4/5=0,8
83/2=41,5
53/4=13,25
17/25=0,68
7/20=0,35
[tex]3 \frac{5}{8} = \frac{29}{8} = 3.625[/tex]
19/40=0,475
274/200=1,37
