a) 7/5 =1,4

3/8 =0,375

16/25 =0,64

=1,4

=0,375

=0,64

= 14/10

= 375/1000

= 64/100

\(a.\)

\(0.3=\dfrac{3}{10}\)

\(0.72=\dfrac{72}{100}\)

\(1.5=\dfrac{15}{10}\)

\(9.347=\dfrac{9347}{1000}\)

\(b.\)

\(\dfrac{1}{2}=\dfrac{5}{10}\)

\(\dfrac{2}{5}=\dfrac{4}{10}\)

\(\dfrac{3}{4}=\dfrac{75}{100}\)

\(\dfrac{6}{25}=\dfrac{24}{100}\)

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,3/10=0,3`

`3/100=0,03`

`4 25/100=4 1/4=4,25`

`2002/1000=2,002`

`b,1/4=0,25`

`3/5=0,6`

`7/8=0,875`

`1 1/2=1,5`

a) Biểu diễn bằng số thập phân: 0,3; 0,03; 4,25; 2,002

b) Biểu diễn bằng số thập phân: 

\(\dfrac{1}{4}=\dfrac{25}{100}=0,25\\ \dfrac{3}{5}=\dfrac{6}{10}=0,6\\ \dfrac{7}{8}=\dfrac{875}{1000}=0,875\\ 1\dfrac{1}{2}=\dfrac{3}{2}=\dfrac{15}{10}=1,5\)

a) \(\dfrac{3}{10}=0.3\)

\(\dfrac{3}{100}=0.03\)

\(4\dfrac{25}{100}=4.25\)

\(\dfrac{2002}{1000}=2.002\)

b) \(\dfrac{1}{4}=0.25\)

\(\dfrac{3}{5}=0.6\)

\(\dfrac{7}{8}=0.875\)

\(1\dfrac{1}{2}=1.5\)

0,1: 0,01: 0,001:0,0001

\(\dfrac{1}{10}=0.1\)

\(\dfrac{1}{100}=0.01\)

\(\dfrac{1}{1000}=0.001\)

\(\dfrac{1}{10000}=0.0001\)

a) 0,1;0,01;0,001;0,0001

a) \(\dfrac{1}{10}=0,1\)

\(\dfrac{1}{100}=0,01\)

\(\dfrac{1}{1000}=0,001\)

\(\dfrac{1}{10000}=0,0001\)

b) \(\dfrac{84}{10}=8,4\)

\(\dfrac{225}{100}=2,25\)

\(\dfrac{6453}{100}=64,53\)

\(\dfrac{25789}{10000}=2,5789\)

CTVHS là gì vậy ??

\(\frac{2}{5}=\frac{4}{10}\)\(\frac{5}{2}=\frac{25}{10}\) \(\frac{16}{25}=\frac{64}{100}\) \(\frac{132}{125}=\frac{1052}{1000}\)

2,5 ; 0,4 ; 2,125 ; 0,64 ; 1,056

\(\frac{5}{2}=\frac{5.5}{2.5}=\frac{25}{10}\)

\(\frac{2}{5}=\frac{2.2}{5.2}=\frac{4}{10}\)

\(\frac{17}{8}=\frac{17.125}{8.125}=\frac{2125}{1000}\)

\(\frac{16}{25}=\frac{16.4}{25.4}=\frac{64}{100}\)

\(\frac{132}{125}=\frac{132.8}{125.8}=\frac{1056}{1000}\)

Tick đúng cho mình nhé

\(0,7=\frac{7}{10}\)

\(0,94=\frac{94}{100}\)

\(2,7=\frac{27}{100}\)

\(4,567=\frac{4567}{1000}\)

b)  \(\frac{1}{4}=\frac{25}{100}\)

\(\frac{7}{5}=\frac{14}{10}\)

\(\frac{16}{25}=\frac{64}{100}\)

\(\frac{3}{2}=\frac{15}{10}\)

\(0,7=\frac{7}{10}\)

\(0,94=\frac{94}{100}\)

\(2,7=\frac{27}{10}\)

\(4,567=\frac{4567}{1000}\)

b) \(\frac{1}{4}=\frac{25}{100}\)

\(\frac{7}{5}=\frac{14}{10}\)

\(\frac{16}{25}=\frac{64}{100}\)

\(\frac{3}{2}=\frac{15}{10}\)

~ Chúc bạn học giỏi ! ~ 

^^

\(a,=\dfrac{1}{10}+\dfrac{2}{10}+\dfrac{3}{10}+\dfrac{4}{10}+\dfrac{5}{10}+\dfrac{6}{10}+\dfrac{7}{10}+\dfrac{8}{10}+\dfrac{9}{10}=\dfrac{45}{10}=4,5\\ b,=\dfrac{4}{5}\times\left(\dfrac{3}{8}+\dfrac{5}{8}-\dfrac{7}{8}\right)\times2=\dfrac{8}{5}\times\dfrac{1}{8}=\dfrac{1}{5}=0,2\)

a) Rút gọn các phân số về tối giản, ta được:
\(\dfrac{1}{10}\)+\(\dfrac{2}{10}\)+\(\dfrac{3}{10}\)+\(\dfrac{4}{10}\)+\(\dfrac{5}{10}\)+\(\dfrac{6}{10}\)+\(\dfrac{7}{10}\)+\(\dfrac{8}{10}\)+\(\dfrac{9}{10}\)= kết quả là \(\dfrac{45}{10}\) ra số thập phân = \(4,5\)
b) \(\dfrac{4}{5}\) \(\times\) \(\left(\dfrac{3}{8}+\dfrac{5}{8}-\dfrac{7}{8}\right)\) = \(\dfrac{4}{5}\times\dfrac{1}{8}\) = \(\dfrac{4}{40}=\dfrac{1}{10}\)\(\div\dfrac{1}{2}\)
 = \(\dfrac{2}{10}=0,2\)

a: \(1\dfrac{9}{10}=1,9\)

\(2\dfrac{66}{100}=2,66\)

\(3\dfrac{72}{100}=3,72\)

\(4\dfrac{999}{1000}=4,999\)

b: \(8\dfrac{2}{10}=8,2\)

\(36\dfrac{23}{100}=36,23\)

\(54\dfrac{7}{100}=54,07\)

\(12\dfrac{254}{1000}=12,254\)

a) 2kg 350g = 2,350kg ;

1kg 65g  =1,065 kg.

b) 8 tấn 760kg = 8,760 tấn ;

2 tấn 77 kg = 2,077 tấn.

a) 2kg 350g = 2,350kg ;

1kg 65g  =1,065 kg.

b) 8 tấn 760kg = 8,760 tấn ;

2 tấn 77 kg = 2,077 tấn.

a)

2kg 350g=2,35kg