0,9 x 438 x 2 + 0 ,18 x 2520 + 0.6 x 310 x 3

=(0.9 x 438 x 2 ) + (0.18 x 2520) + ( 0.6 x 310 x 3 )

=788.4 + 453.6 + 558

=1800

k nha

= 1800 nha !

0.9 x 438 x 2 + 0.18 x 2520 + 0.6 x 310 x 3

= 1.8 x 438 + 1.8 x 252 + 1.8 x 310

= 1.8 x ( 438 + 252 + 310 )

= 1.8 x 1000

= 1800

a. 32,4 x 6,34 + 3,66 x 32,4 + 0,5

= 32,4 x ( 6,34 + 3,66) + 0,5

= 32,4 x 10  + 0,5

= 324+0,5

= 324,5

b. 0,9 x 438 x 2 + 0,18 x 2520 + 0,6 x 310 x 3

= 1,8 x 438 + 1,8 x 252 + 1,8 x 310

= 1,8 x ( 438 + 252 + 310)

= 1,8 x 1000

= 1800

0,9x438x2+0,18x2520+0,6x310x3

=788,4+453,6+558

=1242+558

=1800

k cho mình nhé các bn

=(0,9x2)x438+(0,18x10)x252+(0,6x3)x310

=1,8x438+1,8x252+1,8x310

=1,8x(438+252+310)

=1,8x1000

=1800 

Nhớ ủng hộ mk 

you is my best friend

kick mk nhé

\(A=\frac{18\times123+9\times567\times2+3\times310\times6}{25\times1,8\times4}\)

\(A=\frac{18\times123+9\times2\times567+3\times6\times310}{25\times4\times1,8}\)

\(A=\frac{18\times123+18\times567+18\times310}{100\times1,8}\)

\(A=\frac{18\times\left(123+567+310\right)}{180}\)

\(A=\frac{18\times1000}{180}\)

\(A=\frac{18000}{180}\)

\(A=100\)

a) 

− 2 3 x + 1 5 = 3 10 − 2 3 x = 1 10 x = 1 10 : − 2 3 x = − 3 20

b)

− 1 2 + 1 3 : x = 1 1 3 : x = 1 + 1 2 1 3 : x = 3 2 x = 1 3 : 3 2 x = 2 9

c) 

5 3 8 − 4 5 x − 1 = 4 3 8 4 5 x − 1 = 5 3 8 − 4 3 8 4 5 x − 1 = 1 x − 1 = 5 4 x = 9 4

 \(\frac{22}{5}+\frac{51}{9}+\frac{11}{3}+\frac{3}{5}+\frac{1}{3}+\frac{1}{4}\)

\(=\left(\frac{22}{5}+\frac{3}{5}+\frac{1}{4}\right)+\left(\frac{51}{9}+\frac{11}{3}+\frac{1}{3}\right)\)

\(=\left(\frac{88}{20}+\frac{12}{20}+\frac{5}{20}\right)+\left(\frac{51}{9}+\frac{33}{9}+\frac{3}{9}\right)\)

\(=\frac{105}{20}+\frac{87}{9}\)

\(=\frac{21}{4}+\frac{29}{3}\)

\(=\frac{63}{12}+\frac{116}{12}\)

\(=\frac{179}{12}\)