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Nhanh rồi mình tích cho

a: \(\dfrac{6}{7}\cdot\dfrac{16}{15}\cdot\dfrac{7}{6}\cdot\dfrac{21}{32}=\dfrac{16}{32}\cdot\dfrac{21}{15}=\dfrac{1}{2}\cdot\dfrac{7}{5}=\dfrac{7}{10}\)

b: \(\dfrac{21}{17}\cdot\dfrac{13}{14}\cdot56\cdot\dfrac{3}{42}=\dfrac{21}{14}\cdot\dfrac{13}{17}\cdot\dfrac{1}{14}\cdot56=\dfrac{78}{17}\)

c: \(=\dfrac{11}{21}\left(\dfrac{7}{4}+\dfrac{5}{4}\right)=\dfrac{11}{21}\cdot3=\dfrac{11}{7}\)

có ai giúp mk lo

( 81,6 x 27,3 - 17,3 x 81,6 ) x ( 32 x 11 - 3200 x 0,1 - 32 )

=  ( 81,6 x 27,3 - 17,3 x 81,6 ) x ( 32 x 11 - 32 x 10 - 32 )

= ( 81,6 x 27,3 - 17,3 x 81,6 ) x 32 x ( 11 - 10 - 1 )

= ( 81,6 x 27,3 - 17,3 x 81,6 ) x 32 x 0

= 0

58 x 42 + 32 x 8 + 5 x16 

= (2x29)(21x2) +(4x8)x8 + 5x(4x4)

= 4 x 609 + 4 x 64 + 4x20

= 4( 609+ 64+ 20)

= 4 x 693

= 2772

58.42+32.8+5.16 = 2436 + 256 + 80 = 2772

58 x 42 + 32 x8 + 5 x 16 = 2772

nhớ t i c k cho mik nhé

tích mình đi

ai tích mình 

mình tích lại 

thanks

\(\frac{14^{16}\times21^{32}\times35^{48}}{10^{16}\times35^{32}\times7^{96}}\)

\(=\frac{\left(2\times7\right)^{16}\times\left(3\times7\right)^{32}\times\left(5\times7\right)^{48}}{\left(2\times5\right)^{16}\times\left(5\times7\right)^{32}\times7^{96}}\)

\(=\frac{2^{16}\times7^{16}\times3^{32}\times7^{32}\times5^{48}\times7^{48}}{2^{16}\times5^{16}\times5^{32}\times7^{32}\times7^{96}}=\frac{2^{16}+7^{96}+3^{32}+5^{48}}{2^{16}\times5^{48}\times7^{32}\times7^{96}}\)

\(=\frac{3^{32}}{7^{32}}=\left(\frac{3}{7}\right)^{32}\)

a) 67+135+33

= ( 67+33)+135

= 100 + 135

= 235

b) 146+121+54+379

= ( 146+54)+( 121+379)

= 200 + 500

= 700

c) 198+232-98-32

= ( 232-32)+(198-98)

= 200 + 100

= 300

d)1+2+3+4+.........+50

= ( 50+1) x 50:2 =1275

e)2+4+6+8+..........+100

= ( 100+2) x 50 : 2 =2550

f) 23 x 56 +56

= 1288 + 56

= 1344

g)32 x 19+32

= 608 + 32

= 640

\(a.67+135+33\)

\(=\left(67+33\right)+135\)

\(=100+135=235\)  

\(b.141+121+54+379\)

\(=\left(146+54\right)+\left(121+379\right)\)

\(=200+500=700\)

\(c.198+232-98-32\)

\(=\left(232-32\right)+\left(198-98\right)\)

\(=200+100=300\)

\(f.23.56+56=1288+56=1344\)

\(g.32.19+32=608+32=640\)

32 nhân 12 =384

14 nhân 23=322

32 nhân 12 =384

14 nhân 23=322

32 nhân 12 =384

14 nhân 23=322

Ta có\(7^{14}< 8^{14}=2^{42}< 2^{55}=32^{11}\)

Vậy\(7^{14}< 32^{11}\)

b: =-21(19+81)=-2100

=2697 nha

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