1/41>3/124>5/207>2/83

Ta co

3/124=30/1240

1/41=30/1230

5/207=30/1242

2/83=30/1245

k cho mik nha!

2                                                                

2                            

7/41 + 5/9 + -7/41 + 16 / 9

\(= \frac{7}{41} - \frac{7}{41} + \frac{5}{9} + \frac{16}{9}\)

\(\frac{7}{41} - \frac{7}{41} = 0\)

\(0 + \frac{5}{9} + \frac{16}{9}\)

\(\frac{5}{9} + \frac{16}{9} = \frac{21}{9}\)

\(\frac{21}{9}=\frac{7}{3}\)

**Trả lời:
\(\frac{7}{41}+\frac59+\frac{-7}{41}+\frac{16}{9}\)
\(=\left(\frac{7}{41}+\frac{-7}{41}\right)+\left(\frac59+\frac{16}{9}\right)\)
\(=0+\frac{21}{9}\)
\(=\frac{21}{9}.\)

452

a/ \(\left(x-35\right)-120=0\)

\(\Leftrightarrow x-35=0+120\)

\(\Leftrightarrow x-35=120\)

\(\Leftrightarrow x=120+35\)

\(\Leftrightarrow x=155\)

Vậy ...

b/ \(124+\left(188-x\right)=217\)

\(\Leftrightarrow188-x=217-124\)

\(\Leftrightarrow188-x=93\)

\(\Leftrightarrow x=95\)

Vậy ...

b/ \(156-\left(x+61\right)=82\)

\(\Leftrightarrow x+61=74\)

\(\Leftrightarrow x=13\)

Vậy ..

Đổi hết ra số thập phân mà so sánh ý bạn.

Vậy bạn đổi và làm giúp mình với

a,\(=\frac{-5}{9}+\frac{8}{15}+\frac{-2}{11}+\frac{-4}{9}+\frac{7}{15}\)

\(\left(\frac{-5}{9}+\frac{-4}{9}\right)+\left(\frac{8}{15}+\frac{7}{15}\right)+\frac{-2}{11}\)

=-1+1+-2/11

=0+-2/11

=-2/11

b,\(=\left(\frac{5}{13}+\frac{8}{13}\right)+\left(\frac{-20}{41}+\frac{-21}{40}\right)+\frac{-5}{17}\)

=1+-1+-5/17

=0+-5/17

=-5/17

c,\(=\left(\frac{1}{5}+\frac{4}{5}\right)+\left(\frac{-2}{9}+-\frac{7}{9}\right)+\frac{16}{17}\)

=1+-1+16/17

=0+16/17

=16/17

d,\(=\frac{1}{3}-\frac{1}{5}+\frac{1}{5}-\frac{1}{7}+\frac{1}{7}-\frac{1}{9}+...+\frac{1}{99}-\frac{1}{101}\)

\(=\frac{1}{3}-\frac{1}{101}=\frac{98}{303}\)

a.\(\frac{-5}{9}\)+\(\frac{8}{15}\)+\(\frac{-2}{11}\)+\(\frac{4}{-9}\)+\(\frac{7}{15}\)

=\(\frac{-5}{9}\)+\(\frac{4}{-9}\)+\(\frac{8}{15}\)+\(\frac{7}{15}\)+\(\frac{-2}{11}\)

=(\(\frac{-5}{9}\)+\(\frac{-4}{9}\))+(\(\frac{8}{15}\)+\(\frac{7}{15}\))+\(\frac{-2}{11}\)

=(-1)+1+\(\frac{-2}{11}\)

=0+\(\frac{-2}{11}\)

=\(\frac{-2}{11}\).

a) x : 13 = 41 

x=533

 b) 1428 : x = 14   

x=102

 c) 4x : 17 = 0

4x=0

x=0

d)7x – 8 = 713   

7x=721

x=103

e) 8 . (x – 3) = 0   

x-3=0

x=3

  f) 0 : x = 0

x=0