Lời giải:
$20,18\times 8,5+20,18+20,18:2$

$=20,18\times 8,5+20,18\times 1+20,18\times 0,5$

$=20,18\times (8,5+1+0,5)=20,18\times 10=201,8$

20,18 x ( 31,06 +67,82+1)

= 20,18 x 99,88

= 2015,5704

20,18 x ( 31,06 +67,82+1)

= 20,18 x 99,88

= 2015,5704

\(20,18.7,5+20,18+20,18:2\\ =20,18.\left(7,5+1+0,5\right)\\ =20,18.9\\ =181,62\)

\(20,18\times7,5+20,18+20,18:2\)
\(=20,18\times7,5+20,18\times1+20,18\times0,5\)
\(=20,18\times\left(7,5+1+0,5\right)\)
\(=20,18\times9\)
\(=181,62\)

a, 20,18 x 7,5 + 20,18 + 20,18 + 20,18 : 2

= 20,18 x 7,5 + 20,18 x 1 + 20,18 x 1 + 20,18 x 0,5

= 20,18 x ( 7,5 + 1 + 1 + 0,5)

= 20,18 x 10

= 201,8 

b, 100 : 9   - 79,3 : 9

= (100 - 79,3) : 9

= 20,7 : 9

= 2,3

\(20,18\times7,5+20,18+20,18+20,18:2=20,18\times7,5+2\times20,18+20,18.\dfrac{1}{2}=20,18\left(7,5+2+\dfrac{1}{2}\right)=20,18\times10=201,8\)

= 20,18 x(15,75+ 72,41 + 11,84)

= 20,18 x 100

= 2018

\(=2,019\left(40+9\right)+20,18.6\)

\(=2,019.49+20,18.6\)

\(=98,931+121,98=220,011\)

a, 8,2 : 10 + 8,2 x 0,9

= 8,2 x 0,1 + 8,2 x 0,9

= 8,2 x ( 0,1 + 0,9 )

= 8,2 x 1

= 8,2             

b, 20,18 x 7,5 + 20,18 + 20,18 + 20,18 : 2

= 20,18 x 7,5 + 20,18 x 2 + 20,18 x 0,5

= 20,18 x ( 7,5 + 2 + 0,5 )

= 20,18 x 10

= 201,8

20,18 x 7,5 + 20,18 + 20,18 + 20,18 : 2

= 20,18 x 7,5 + 20,18 x 1 + 20,18 x 1 + 20,18 x 0,5

= 20,18 x (7,5 + 1 + 1 + 0,5)

= 20,18 x 10

= 201,8

bằng 201,8 nhé