4\(\dfrac{1}{2}\)=4,5      3\(\dfrac{4}{5}\)=3,8         2\(\dfrac{3}{4}\)=2,75      1\(\dfrac{12}{25}\)=1,48.

4 1/2=4,5

3 4/5=3,8

2 3/4=2,75

1 12/25=1,48

đúng 100% nha

\(2\dfrac{3}{5}\) = 2 + 0,6 = 2,6

\(7\dfrac{1}{4}\) = 7 + 0,25 = 7,25

\(5\dfrac{1}{10}\) = 5 + 0,1 = 5,1

\(6\dfrac{1}{2}\) = 6 + 0,5 = 6,5

4\(\dfrac{1}{2}\) = 4+0,5 = 4,5

4\(\dfrac{1}{2}\) = \(\dfrac{9}{2}\) = 4,5

3\(\dfrac{4}{5}\) = 3+0,8 = 3,8

3\(\dfrac{4}{5}\) = \(\dfrac{19}{5}\) = 3,8

2\(\dfrac{3}{4}\) = 2 + 0,75 = 2,75

2\(\dfrac{3}{4}\) = \(\dfrac{11}{4}\) = 2,75

1\(\dfrac{12}{25}\) = 1 + \(0,48\) = 1,48

1\(\dfrac{12}{25}\) = \(\dfrac{37}{25}\) = 1,48

4$\genfrac{}{}{0ex}{}{1}{2}$ = 4+0,5 = 4,5

4$\genfrac{}{}{0ex}{}{1}{2}$ = $\genfrac{}{}{0ex}{}{9}{2}$ = 4,5

3$\genfrac{}{}{0ex}{}{4}{5}$ = 3+0,8 = 3,8

3$\genfrac{}{}{0ex}{}{4}{5}$ = $\genfrac{}{}{0ex}{}{19}{5}$ = 3,8

2$\genfrac{}{}{0ex}{}{3}{4}$ = 2 + 0,75 = 2,75

2$\genfrac{}{}{0ex}{}{3}{4}$ = $\genfrac{}{}{0ex}{}{11}{4}$ = 2,75

1$\genfrac{}{}{0ex}{}{12}{25}$ = 1 + $0,48$ = 1,48

1$\genfrac{}{}{0ex}{}{12}{25}$ = $\genfrac{}{}{0ex}{}{37}{25}$ 

0,7=7/10

0,05=1/20

0,079=79/1000

0,654=327/500

0,47=47/100

b)45/10=4,5

437/10=43,7

58246/100=58,246

94/100=0,94

53/1000=0,053

0,7=7/10

0,05=1/20

0,079=79/1000

0,654=327/500

0,47=47/100

b)45/10=4,5

437/10=43,7

58246/100=58,246

94/100=0,94

53/1000=0,053

bài làm

4  1/2 =9/2

3  4/5=19/5

hok tốt ^^

4 1/2= 9/2

3 4/5= 19/5

a)3 7/10=3,7

b)11 2/100=11,02

c)5 12/100=5,12

tick nha

\(3\frac{7}{10}=\frac{37}{10}\)

\(11\frac{2}{100}=\frac{1102}{100}\)

\(5\frac{12}{100}=\frac{512}{100}\)

a)0,75

b)2,25

bài 2:

a)60%

b)93,75%

k nha bạn

B1 a = 0,75            b=2,25