2282152+155992+1752

(228152+155992)+1752

          384144    +1752=385896

0,25 x 12,44 + 15,89

= \(3,11+15,89\)rút gọn đó nha

= \(19\)nhớ k nha

=19 kb với mk nha

0,25 x 12,44 + 15,89

= 

3

,

11

+

15

,

89

3,11+15,89rút gọn đó nha

= 

19

19

\(725:25.10-432:18+127=\left(725:25\right).10-\left(432:18\right)+127=29.10-24+127=290-24+127=393\)

37000

\(\frac{2014.150+1000}{151.2014-1014}\)= \(\frac{150+1000}{\left(150+1\right).1014}\)

= \(\frac{1000}{1014}\)= \(\frac{500}{507}\)

nhớ ủng hộ mik nha

= 374 : 187

= 2

k mk nha

374 : ( 17 . 11 )

= 374 : 187

= 2 

......

A)374:(17x11)

=374:187

=2

\(\frac{27.13-12}{24+37.12}\)

\(=\frac{351-12}{24+444}\)

\(=\frac{113}{156}\)

đặt S=1.2.3+2.3.4+....+47.48.49

4S=1.2.3.(4-0)+2.3.4.(5-1)+...+47.48.49.(50-46)

4S=1.2.3.4-1.2.3+2.3.4.5-1.2.3.4+....+47.48.49.50-46.47.48.49

4S=47.48.49.50-1.2.3

S=(47.48.49.50-1.2.3):4

cool queen đúng rồi

???????????

\(445-52+155+452\\ =\left(445+155\right)+\left(452-52\right)\\ =600+4000\\ =1000\\ 102\cdot55-102\cdot73+51\cdot36\\ =102\cdot\left(55-73\right)+51\cdot36\\ =102\cdot\left(-18\right)+102\cdot18\\ =0\\ 4\cdot5\cdot2\cdot25\cdot5-1000\\ =5000-1000\\ =4000\\ 8782-291\cdot13\\ =4999\\ 254+\left\{38\cdot\left[\left(42-16\right):2\right]\right\}\\ =254+\left[38\cdot\left(26:2\right)\right]\\ =254+\left(38\cdot13\right)\\ =748\\ \left(2791\cdot34+7882:14\right)\cdot0+1510-510:2\\ =1510-255\\ =1255\)

a. \(445-52+155+452=\left(445+155\right)+\left(452-52\right)=600+400=1000\)

b. \(102\cdot55-102\cdot73+51\cdot36=102\left(55-73+18\right)=102\cdot0=0\)

c.\(4\cdot5\cdot2\cdot25\cdot5-1000=4\cdot25\cdot5\cdot5\cdot2-1000=100\cdot50-1000=5000-1000=4000\)

d. \(8782-291\cdot13=8782-3783=4999\)

e. \(254+\left\{38\left[\left(42-16\right)\div2\right]\right\}=254+\left\{30\cdot13\right\}=254+494=748\)

f. \(\left(2791\cdot34+7882\div14\right)\cdot0+1510-510\div2=0+1510-255=1255\)\