`9/14+19/18+19/14+35/18`

`=(9/14+19/14)+(19/18+35/18)`

`=28/14+54/18`

`=2+3`

`=5`

   42 x 3 + 18 x 32 + 18 x 61

= 6 x 7 x 3 + 18 x 32 + 18 x 61

= 18 x 7 + 18 x 32 + 18  x 61

= 18 x (7 + 32 + 61)

= 18 x 100

= 1800

\(42\times3+18\times32+18\times61\)

\(=6\times7\times3+18\times32+18\times61\)

\(=18\times7+18\times32+18\times61\)

\(=18\times\left(7+32+61\right)\)

\(=18\times100\)

\(=1800\)

6 x 7 x 3 + 18 x 32 +18 x 61

18 x 7 + 18 x32 +18 x 61

18 x ( 7 + 32 + 61 )

18 x           100

1800

=9/4x2/3+16/9x4/3

=18/12+64/36

=54/36+64/36=118/36=59/18

 36/16 x 12/18 + 32/18 x 24/18 

\(=\dfrac{9}{4}\times\dfrac{2}{3}+\dfrac{16}{9}\times\dfrac{4}{3}\)

\(=\dfrac{3}{2}+\dfrac{64}{27}\)

\(=\dfrac{209}{54}\)

\(\frac{1}{15}+\frac{4}{15}+\frac{5}{18}+\frac{7}{18}\)

\(=\left(\frac{1}{15}+\frac{4}{15}\right)+\left(\frac{5}{18}+\frac{7}{18}\right)\)

\(=\frac{5}{15}+\frac{12}{18}\)

\(=\frac{1}{3}+\frac{2}{3}\)

\(=\frac{3}{3}=1\)

\(\frac{1}{15}+\frac{4}{15}+\frac{5}{18}+\frac{7}{18}\)

\(=\left(\frac{1}{15}+\frac{4}{15}\right)+\left(\frac{5}{18}+\frac{7}{18}\right)\)

\(=\frac{1}{3}+\frac{2}{3}\)

\(=1\)

\(\frac{1}{15}+\frac{4}{15}+\frac{5}{18}+\frac{7}{18}\)

\(=\left(\frac{1}{15}+\frac{4}{15}\right)+\left(\frac{5}{18}+\frac{7}{18}\right)\)

\(=\frac{5}{15}+\frac{12}{18}\)

\(=\frac{1}{3}+\frac{2}{3}\)

\(=\frac{3}{3}\)

\(\Rightarrow=1\)

172,84 - 26,72 + 27,16 - 33,28

= ( 172,84 + 27,16 ) - ( 26,72 + 33,28 )

= 200 + 60

= 260

=(172,84-33,28)+(27,16-26,72)

=139,56+0,44

=140

nếu đúng thì cho mình 1 like nhé

= ( 18 : 9) x 50

= 2 x 50

= 100

\(\left(50\times18\right):9\\ 50\times18:9\\ =50\times\left(18:9\right)\\ =50\times2\\ =100\)

(50 x 18) : 9 

= (18 : 9 ) x 50

= 2 x 50

= 100

4 x 18 x 25

= 18 x (4 x 25)

= 10 x 100 = 1800

35 x 18 - 9 x 70 + 135

= 630- 630 + 135

=     0        + 135

=     135