96 x 24 + 192 x 25 + 288 x 9 - 96

= 96 × 24 + 96 × 2 × 25 + 96 × 3 × 9 - 96 × 1

= 96 × 24 + 96 × 50 + 96 × 27 - 96 ×1

= 96 × (24 + 50 + 27 -1)

= 96 × 100

= 9600

thanks ban

Tính hợp lí

a,15.(27+ 18 +6 ) + 15.( 23 +12)

  = 15(27+18+6+23+12)

  = 15.86

  = 1290

b,24.(15 + 49 ) + 12. ( 50 + 42 )

=12.2(15+49)+12.(50+42)

= 12(30+98)+12(50+42)

=12(30+98+50+42)

=12.220

= 2640

c,53.(51+4)+53.(49+96) +53

=53(51+4)+53(49+96)+53.1

=53(51+4+49+96+1)

=53.201

=10653

d,42.( 15 +96) +6.(25 +4).7  

=42(15+96)+42(25+4)

=42(15+96+25+4)

=42.140

=5880

tick đúng cho mk nha pikachu

20-2.(x+14)=16

d) (-25).20+(-25).(-120)

= (-25) . [20+(-120)

= (-25) . (-100)

= 2500

(-25).20+(-25).(-120)=(-25).(20-120)=(-25).(-100)=2500

\(\sqrt{25}\)= 5 , - \(\sqrt{4}\) = 2 => 5-3*2:9= 5-6:9= 5-\(\dfrac{2}{3}\)= \(\dfrac{13}{3}\)

ta có \(\sqrt{25}-3\sqrt{\dfrac{4}{9}}\)

\(\Rightarrow\sqrt{25}.2\)

\(\Rightarrow5.2=10\)

25 x 10  + 25 x 5 + 4+7

=250 +125 +4 +7

=375 + 4 +7 

=379+7=386         Nhớ tk nha

25 x 10 + 5 + 25 x 4 + 7

= 25 x 10 + 25 x 5 + 4 + 7 

= 250 + 125 = 4 + 7 

= 375 + 4 + 7 

= 379+ 7 

= 386

$(-25)\cdot47\cdot(-4)$

$=[(-25)\cdot(-4)]\cdot47$

$=(25\cdot4)\cdot47$

$=100\cdot47$

$=4700$

a. 4² . 46 + 4² . 52

= 4² . (46+52)

= 16 . 98

= 1568

b. -75+58+(-25)

= [-75+(-25)]+58

= -100+58

= -42

c. -4 . 5 . (-25)

= [-4 . (-25)] . 5

= 100 . 5

= 500

\(\frac{7}{25}+\frac{-18}{25}+\frac{4}{23}+\frac{5}{7}+\frac{19}{23}\)

\(=\left(\frac{7}{25}-\frac{11}{25}\right)+\left(\frac{4}{23}+\frac{19}{23}\right)+\frac{5}{7}\)

\(=\frac{-4}{25}+1+\frac{5}{7}\)

\(=\frac{-28}{175}+\frac{175}{175}+\frac{125}{175}\)

\(=\frac{272}{175}\)

\(\frac{7}{25}+\left(\frac{-18}{25}\right)+\frac{4}{23}+\frac{5}{7}+\frac{19}{23}\)

\(=\left(\frac{7-18}{25}\right)+\left(\frac{4+19}{23}\right)+\frac{5}{7}\)

\(=\frac{-11}{25}+1+\frac{5}{7}\)

\(=\frac{223}{175}\)

a ) - 24

B ) - 65

\(25\cdot\left(-4\right)-54:9+\left(-48\right):\left(-8\right)=-100-6+6=-100\)

25.(-4)-54:9+(-48):(-8)

=-100-6+6

=-106+6

=-100