Mk giải câu 1 nha

1) 2x - 3 = x + 1/2

➡️2x - x = 1/2 + 3

➡️x        = 7/2

Hok tốt~

Ta có: \(\left(2008-\dfrac{2}{135}+\dfrac{1}{50}\right)-\left(1-\dfrac{7}{135}+\dfrac{4}{150}\right)-\left(5+\dfrac{5}{135}+\dfrac{3}{50}\right)\)

= \(2008-\dfrac{2}{135}+\dfrac{1}{50}-1+\dfrac{7}{135}-\dfrac{4}{150}-5-\dfrac{5}{135}-\dfrac{3}{50}\)

= (2008-1-5) + \(\left(\dfrac{1}{50}-\dfrac{3}{50}\right)-\left(\dfrac{2}{135}-\dfrac{7}{135}\right)-\dfrac{4}{150}\)

=2002 \(-\dfrac{1}{25}\)+\(\dfrac{1}{27}\)\(-\dfrac{4}{150}\)

=2001,9(3)

\(\left(2018-\frac{2}{135}+\frac{1}{50}\right)-\left(1-\frac{7}{135}+\frac{4}{50}\right)-\left(5+\frac{5}{135}+\frac{3}{50}\right)\)

\(=2018-\frac{2}{135}+\frac{1}{50}-1+\frac{7}{135}-\frac{4}{50}-5-\frac{5}{135}-\frac{3}{50}\)

\(=2012-\frac{6}{50}\)

    135x(5x3)

=135x5x135x3

=........................................

tự tính

=135:5x3

=27x3

=81

135 x 37 + 135 +  62 x 135

= 135 x 37 + 135 x 1 +  62 x 135

= 135 x ( 37 + 1 + 62)

 = 135 x 100

= 13500

B. 173 + 45 + 135 + 27 + 50 

= (173+27) + (45 +135) +50

=200 + 180 + 20 + 30

= 200 +200 +30

=430

bằng 500 chứ câu a ấy

A. 35+156+21+75+179+44

=(35+75)+(156+44)+(21+179)

=100+200+200

=500

B.173+45+135+27+50

=(173+27)+(45+125)+50

=200+180+20+30

=200+200+30

=430