a: \(A=\left[111\cdot\left(38\cdot3-133\right)\right]\cdot2018\)

\(=111\cdot\left(-19\right)\cdot2018=-4255962\)

b: \(B=\left[25\left(1+3\cdot3-5\cdot2\right)\right]:20182019\)

\(=25\left(1+9-10\right):20182019=0\)

c: \(C=\dfrac{\left[244\left(395-195\right)\right]}{122\cdot200}=\dfrac{244}{122}=2\)

d: \(D=\dfrac{355\cdot45\cdot55}{11\cdot9\cdot7}=\dfrac{355\cdot5\cdot5}{7}=\dfrac{8875}{7}\)

1-287/3

2-0

etwe

\(39500\)

395 x 15 + 83 x 395 + 395 x 2

= 395 x (15 + 83 + 2)

= 395 x 100

= 39500.

\(395\times15+83\times15+395\times2=395\times\left(83+15+2\right)=395\times100=39500\)

\(1975\times37+395\times5\times24-1975+3950\times15\)
\(=1975\times37+1975\times24-1975\times1+1975\times30\)
\(=1975\times\left(37+24-1+30\right)\)
\(=1975\times90=177750\)

\(\frac{244\times395-151}{244+395\times243}\)

\(=\frac{243\times395+395-151}{243\times395+244}\)

\(=\frac{243\times395+244}{243\times395+244}\)

\(=1\)

a) (12 + 8) x 4 = 20 x 4

                         = 80

12 + 8 x 4 = 12 + 32

                         = 44

b) 25 + 75 : 5 = 25 + 15

                         = 40

(25 + 75) : 5 = 100 : 5

                         = 20

Bài làm

a) 248 : 4 + 152 : 4

= ( 248 + 152 ) : 4

= 400 : 4

= 100

b) 4125 : 5 - 395 : 5

= ( 4125 - 395 ) : 5

= 3730 : 5

= 746

248+4+152:4

=(248+152):4

=400:4=100

4125:5-395:5

=(4125-395):5

=3730:5=746.

Dễ vậy mà ko biết !!!!!

244x395-151=96229

244+395x243=96229

k mk nha