\(\dfrac{3}{2}\)

\(=\dfrac{56}{63}\times\dfrac{27}{16}=\dfrac{3}{2}\)

16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27

= 48 x 21 + 48 x 52 + 48 x 27

= 48 x ( 21 + 52 + 27 )

= 48 x 100

= 4800

16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27

=48*21+48*52+48*27

=48*(21+52+27)

=48*100

=4800

   16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27

= 48 x 21 + 48 x 52  + 48 x 27

= 48 x ( 21 + 52 + 27)

= 48 x 100

= 4800

16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27

=48*21+48*52+48*27

=48*(21+52+27)

=48*100

=4800

4800 nha 

16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27

= 48 x 21 + 48 x 52 + 48 x 27

=48 x ( 21 + 52 + 27 )

=48 x 100

= 4800Thu Trang Trần

dễ mà,tách từng tích ra 1 thừa số chung là:4 thì ra thôi

A = 8 . 12 . 32  + 4 . 27 . 24 + 41 .4 . 16 

A = 96 . 32 + 96 . 27 + 41 . 4 . 16 

A = 96 ( 32 + 27 ) +41 . 4 . 16 

A = 96 . 59  + 41 . 64

A = 32 . 3 . 59 + 41 . 32 . 2 

A = 32 ( 3 + 59 + 41 + 2 )

A  = 32 . 105

A = 3360

8 x 12 x 32 + 4 x 27 x 24 + 41 x 6 x 16

=96 x 32 + 96 x 27 + 96 x 41

=96 x (32 + 27 + 41)

= 96 x 100

=9600

A = 8 × 12 × 32 + 4 × 27 × 24 + 41 × 6 × 16

A = 8 × 12 × 32 + 4 × 24 × 27 + 6 × 16 × 41

A = 96 × 32 + 96 × 27 + 96 × 41

A = 96 × (32 + 27 + 41)

A = 96 × 100

A = 9600

=(8x32)x12+(4x24)x27+(6x16)x41

=96x12+96x27+96x41

=96x(12+27+41)

=96x100

=9600

2, 

a) \(315-\left(135-x\right)=215\)

\(\Rightarrow135-x=315-215\)

\(\Rightarrow135-x=100\)

\(\Rightarrow x=135-100\)

\(\Rightarrow x=35\)

b) \(x-320:32=25\cdot16\)

\(\Rightarrow x-10=5^2\cdot4^2\)

\(\Rightarrow x-10=20^2\)

\(\Rightarrow x-10=400\)

\(\Rightarrow x=410\)

c) \(3\cdot x-2018:2=23\)

\(=3\cdot x-1009=23\)

\(\Rightarrow3\cdot x=1032\)

\(\Rightarrow x=1032:3\)

\(\Rightarrow x=344\)

d) \(280-9\cdot x-x=80\)

\(\Rightarrow280-x\cdot\left(9+1\right)=80\)

\(\Rightarrow280-10\cdot x=80\)

\(\Rightarrow10\cdot x=280-80\)

\(\Rightarrow10\cdot x=200\)

\(\Rightarrow x=20\)

e) \(38\cdot x-12\cdot x-x\cdot16=40\)

\(\Rightarrow x\cdot\left(38-12-16\right)=40\)

\(\Rightarrow x\cdot10=40\)

\(\Rightarrow x=40:10\)

\(\Rightarrow x=4\)

bài 1 cậu ko giải giúp mình dc à

g: =900x13

=11700

a)184 x 72 + 184 x 27 + 184

=184 x 72 + 184 x 27 + 184 x 1

= 184 x (72 + 27 + 1 )

=184 x 100=18400

c)1999 x 346 + 1999 + 653 x 1999

=1999 x 346 + 1999 + 653 x 1999 x 1

= 1999 x ( 346 + 653 + 1 )

= 1999 x 1000=1999000

e)23 x 5 x 7 x 4

= ( 23 x 7) x( 5 x 4)

= 161 x 20= 3220

b)1996 x 1257 – 1996 – 256 x 1996

=1996 x 1257 – 1996 – 256 x 1996 x 1

= 1996 x ( 1257 - 256 - 1 )

= 1996 x 1000= 1996000

a ) 184 x 72 +184 x 27 + 184 
 = 184 x ( 72 + 27 ) + 184
 = 184 x 99 + 184 
 = 18216 + 184
 = 18400
c) 1999 x 346 + 1999 + 653 x 1999
 = 1999 x ( 346 + 653 ) + 1999
 = 1999 x 999 + 1999
 = 1997001 + 1999 
 = 1999000
 e)  23 x 5 x 7 x 4
 = 23 x 7 x 5 x 4
 = 161 x 20
 = 3220
 b) 1996 x 1257 -1996 - 256 x 1996
 = 1996 x ( 1257 - 256 ) - 1996
 = 1996 x 1001 - 1996 
 = 1997996 - 1996
 = 1996000
 d) 24 x 89 + 24 + 16 x 15
 = 24 x 89 + 16 x 15 + 24
 = 2136 + 240 + 24
 = 2400
 g) 25 x 36 x 13
 = 25 x 36 x 13
 = 900 x 13
 = 11700
                                                        bài này làm hơi lâu nhưng khá dễ lần sau bạn nên tự
                                                       làm nha ♥♥

\(\frac{9}{27}+\frac{8}{24}+\frac{18}{27}+\frac{16}{24}+\frac{2}{3}\)

=\(\frac{1}{3}+\frac{1}{3}+\frac{2}{3}+\frac{2}{3}+\frac{2}{3}\)

\(=\frac{8}{3}\)

\(\frac{9}{27}+\frac{8}{24}+\frac{18}{27}-\frac{-16}{24}+\frac{2}{3}\)

\(=\frac{9}{27}+\frac{8}{24}+\frac{18}{27}+\frac{16}{24}+\frac{2}{3}\)

\(=\frac{1}{3}+\frac{1}{3}+\frac{2}{3}+\frac{2}{3}+\frac{2}{3}\)

\(=\left[\frac{1}{3}+\frac{2}{3}\right]+\left[\frac{1}{3}+\frac{2}{3}\right]+\frac{2}{3}\)

\(=1+1+\frac{2}{3}=2+\frac{2}{3}=\frac{8}{3}\)

\(\frac{9}{27}+\frac{8}{24}+\frac{18}{27}-\frac{-16}{24}+\frac{2}{3}\)

\(\frac{1}{3}+\frac{1}{3}+\frac{2}{3}+\frac{2}{3}+\frac{2}{3}\)

\(\frac{2}{3}+\frac{2}{3}+\frac{2}{3}+\frac{2}{3}\)

\(\frac{8}{3}\)