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a) \(\frac{15}{10}=1,5\) \(\frac{675}{10}=6,75\) \(\frac{7}{10}=0,7\)
\(\frac{79}{100}=0,79\) \(\frac{5}{100}=0,05\) \(\frac{67}{100}=0,67\)
b) \(\frac{1}{2}=1\div2=0,5\) \(\frac{3}{4}=3\div4=0,75\)
\(\frac{15}{8}=15\div8=1,875\) \(\frac{7}{25}=7\div25=0,28\)
\(\frac{19}{30}=19\div30=0,63\) \(\frac{21}{125}=21\div125=0,168\)
1.
a) 5,8 m = 58 dm
4,9 m = 490 cm
8,3 kg = 8300 g
4,25 m = 42,5 dm
0,13 m = 13 cm
7,189 kg = 71,89 hg
b) 7,8 m2 = 780 dm2
9,05 dm2 = 90500 mm2
7,8 ha = 78000 m2
9,05 dam2 = 905 m2
\(\dfrac{7}{5}=1,4\\ \dfrac{34}{20}=1,7\\ \dfrac{25}{50}=0,5\\ \dfrac{6}{25}=0,24\\ \dfrac{24}{125}=0,192\)
\(a,\frac{7}{5}\)\(=\frac{14}{10}\)\(=1,4\)
\(b,\frac{13}{25}\)\(=\frac{52}{100}\)\(=0,52\)
\(c,\frac{5}{2}\)\(=\frac{25}{10}\)\(=2,5\)
\(d,\frac{54}{90}\)\(=\frac{3}{5}\)\(=\frac{6}{10}\)\(=0,6\)
\(e,\frac{28}{400}\)\(=\frac{7}{100}\)\(=0,07\)
\(g,\frac{64}{8000}\)\(=\frac{1}{125}\)\(=\frac{8}{1000}=0,008\)
a)
\(\dfrac{1}{2}=0,5;\dfrac{3}{4}=0,75;\dfrac{7}{5}=1,4;\dfrac{9}{8}=1,125;\dfrac{26}{25}=1,04;\dfrac{120}{125}=0,96\)
b)
\(\dfrac{15}{25}=0,6;\dfrac{75}{25}=3;\dfrac{90}{300}=0,3;\dfrac{27}{36}=0,75;\dfrac{51}{85}=0,6\)
a,1/2=5/10;3/4=75/100;7/5=140/100;26/25=108/100;120/125=960/1000
b,15/25=60/100;75/25=300/100;90/300=3/10;27/36=3/4=75/100;
51/85=3/5=60/100;39/65=3/5=60/100