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TL:
\(\frac{12}{100}\)= 0,12
\(\frac{5}{100}\)= 0,05
\(\frac{306}{1000}\)= 0,306
-HT-
\(4\frac{2}{10}m=\frac{42}{10}m\)
\(3\frac{12}{100}m=\frac{312}{100}m\)
\(2\frac{2}{25}kg=2\frac{8}{100}kg=\frac{208}{100}kg\)
\(4\frac{2}{10}m=4,2m\)
\(3\frac{12}{100}m=3,12m\)
\(2\frac{2}{25}kg=2,08kg\)
\(\frac{2}{5}\)= 2 : 5 = 0,4
\(\frac{3}{4}\)= 3 : 4 = 0,75
\(\frac{18}{5}\)= 18 : 5 = 3,6
a ) 0,7 = 7/10
0,94 = 94/100
2/7 = 27/10
4,567 = 4567/1000
b ) 1/4 = 25/100
7/5 = 14/10
16/25 = 64/100
3/2 = 15/10
Bài làm :
a)
0,7 = \(\frac{7}{10}\)
0,94 = \(\frac{94}{100}\)
2,7 = \(\frac{27}{10}\)
4,567 = \(\frac{4567}{1000}\)
b)
1/4 = 25/100 .
7/5 = 14/10 .
16/25 = 64/100 .
3/2 = 15/10 .
\(8\frac{3}{5}=8,6\)
\(4\frac{13}{25}=4,52\)
\(1\frac{15}{20}=1,75\)
\(18\frac{3}{4}=18,75\)
\(8\frac{3}{5}=3,8\)
\(4\frac{13}{25}=1,08\)
\(1\frac{15}{20}=-0,25\)
\(18\frac{3}{4}=3,375\)
P/s: Mik ko chác
4 1/2 = 4 x 2+1/2 = 9/2
3 4/5 = 3 x 5+4/5 = 19/5
2 3/4 = 2 x 4+3/4 = 11/4
1 12/25 = 1 x 25+12/25 = 37/25
Tk mk nha
mk cho bài kham khảo nha :
\(4\frac{1}{2}=\frac{9}{2}=4,5\)
\(3\frac{4}{5}=\frac{19}{5}=3,8\)
\(2\frac{3}{4}=\frac{11}{4}=2,75\)
\(1\frac{12}{25}=\frac{37}{25}=1,48\)
ok k mk nha
2/5=0,4
3/25=0.12
98/125=0.784
3/4=0,75
1/2=0,5
HT~~~
TL :
a) \(\frac{2}{5}\)= 0,4
b) \(\frac{3}{25}\)= 0,75
c) \(\frac{98}{125}\)= 0,784
d) \(\frac{3}{4}\)= 0,75
e) \(\frac{1}{2}\)= 0,5
\(a.\)
\(0.3=\dfrac{3}{10}\)
\(0.72=\dfrac{72}{100}\)
\(1.5=\dfrac{15}{10}\)
\(9.347=\dfrac{9347}{1000}\)
\(b.\)
\(\dfrac{1}{2}=\dfrac{5}{10}\)
\(\dfrac{2}{5}=\dfrac{4}{10}\)
\(\dfrac{3}{4}=\dfrac{75}{100}\)
\(\dfrac{6}{25}=\dfrac{24}{100}\)
a) \(0,3=\dfrac{3}{10}\)
\(0,72=\dfrac{72}{100}\)
\(1,5=\dfrac{15}{10}\)
\(9,347=\dfrac{9347}{1000}\)
b) \(\dfrac{1}{2}=\dfrac{5}{10}\)
\(\dfrac{2}{5}=\dfrac{4}{10}\)
\(\dfrac{3}{4}=\dfrac{75}{100}\)
\(\dfrac{6}{25}=\dfrac{24}{100}\)