\(18\times\left(\frac{37}{42}+\frac{37}{56}+\frac{37}{72}\right)\)

\(=18\times\left(37\times\frac{1}{42}+37\times\frac{1}{56}+37\times\frac{1}{72}\right)\)

\(=18\times\text{[}37\left(\frac{1}{42}+\frac{1}{56}+\frac{1}{72}\right)\text{]}\)

\(=18\times\text{[}37\times\frac{1}{18}\text{]}\)

\(=18\times\frac{37}{18}=37\)

18 x [ 37/42+37/56+37/72]

= 18 x 37/18

= 37

~ Học tốt nha ~

k cho mk:>>

\(18\times\left[\frac{37}{42}+\frac{37}{56}+\frac{37}{72}\right]\)

\(=18\times\left[\frac{37}{6\times7}+\frac{37}{7\times8}+\frac{37}{8\times9}\right]\)

\(=18\times\left[37\left\{\frac{1}{6\cdot7}+\frac{1}{7\cdot8}+\frac{1}{8\cdot9}\right\}\right]\)

\(=18\times\left[37\left\{\frac{1}{6}-\frac{1}{7}+\frac{1}{7}-\frac{1}{8}+\frac{1}{8}-\frac{1}{9}\right\}\right]\)

\(=18\times\left[37\left\{\frac{1}{6}-\frac{1}{9}\right\}\right]\)

\(=18\times\left[37\times\frac{1}{18}\right]\)

\(=18\times\frac{37}{18}=37\)

a ) 5 x 216 x 25 x 4 = 1080 x 100 = 108000

b ) 37 x 16 x 25 x 4 = 592 x 100 = 59200

c ) 36 x ( 28 + 82 ) + 64 x ( 69 + 41 ) = 36 x 110 + 64 x 110 = ( 36 + 64 ) x 110 = 100 x 110 = 11000

d ) 42 x ( 53 + 36 + 11 ) = 42 x 100 = 4200

e) 37 x 45 + 56 x 37 - 37 x 1 = 37 x ( 45 + 56 - 1 ) = 37 x 100 = 3700

h) 17 x 1 + 17 x 81 + 18 x 17 = 17 x ( 1 + 81 + 18 ) = 17 x 100 = 1700

Mik nhanh nhất đấy , nhớ click cho mik nha !!!!!!!!!!!!!!!!!!!

a) 5 x 25 x 216 x 4

= ( 5 x 216 ) x ( 25 x 4 )

= 1080 x 100

= 108000

b) 4 x 37 x 25 x 16 

= ( 4 x 25 ) x ( 37 x 16 )

= 100 x 592 

= 59200

a)=(25x4)x5x216=100x5x216=500x216=108000

b)=(4x25)x37x16=100x37x16=3700x16=59200

c)=[36x(28+82)]+[64x(69+41)]=[36x110]+[64x110]=110x(36+64)=110x100=11000

d)=42x(53+36+11)=42x100=4200

e)=37x(45+56-1)=37x100=3700

h)=17x(1+81+18)=17x100=1700

k mk nhá

37*176-37*56+120*73

=37*(176-56+120)

=37*240

=8880

37 x 176 - 37 x 56 + 120 x 73

 = 37 x ( 176  - 56 ) + 120 x 73

= 37 x 120 + 120 x 73

= 120 x ( 37 + 73 )

= 120 x 110

13 200

^^ Cbht!!!    

37 x 176 - 37 x 56 + 120 x 73

= 37 x ( 176 - 56 - 120 ) + 73

= 37 x 0 + 73

= 0 + 73

= 73

a)73.(74-72)+72.(73-74)

=74.(73-73)+(72-72)

=74.0+0

=74

b)37.(25+27)-27.(37+25)

=37.52-27.62

=1924-1674

=250

tick cho mk nha bạn

a)=7x(1/4+1/28+1/70+1/130)

  =7x(1/1x4+1/4x7+1/7x10+1/10x13)

  =7x(1-1/4+1/4-1/7+1/7-1/10+1/10-1/13)

  =7x(1+1/13)

  =7x14/13=98/13

Các câu còn lại p dựa theo cách trên làm nốt nhé!!!

Giải;

1) \(347.222-222.\left(216+184\right):8\) 

\(=347.222-222.400:8\) 

\(=347.222-222.50\) 

\(=222.\left(347-50\right)\) 

\(=222.297\)

\(=65934\) 

2) \(132-\left[116-\left(132-128\right).22\right]\) 

\(=132-\left[116-4.22\right]\) 

\(=132-\left[116-88\right]\) 

\(=132-28\) 

\(=104\) 

3) \(16:\left\{400:\left[200-\left(37+46.3\right)\right]\right\}\) 

\(=16:\left\{400:\left[200-\left(37+138\right)\right]\right\}\) 

\(=16:\left\{400:\left[200-175\right]\right\}\) 

\(=16:\left\{400:25\right\}\) 

\(=16:16\) 

\(=1\) 

4) \(\left\{184:\left[96-124:31\right]-2\right\}.3651\) 

\(=\left\{184:\left[96-4\right]-2\right\}.3651\) 

\(=\left\{184:92-2\right\}.3651\) 

\(=\left\{2-2\right\}.3651\) 

\(=0.3651\) 

\(=0\) 

5) \(46-\left[\left(16+71.4\right):15\right]-2\) 

\(=46-\left[\left(16+284\right):15\right]-2\) 

\(=46-\left[300:15\right]-2\)

 \(=46-20-2\) 

\(=24\)

6) \(3^3.18+72.4^2-41.18\) 

\(=18.\left(27-41\right)+72.16\) 

\(=18.-14+1152\) 

\(=-252+1152\) 

\(=900\)

Giải: (tiếp)

7) \(\left(56.46-25.23\right):23\) 

\(=\left(2576-575\right):23\) 

\(=2001:23\) 

\(=87\) 

8) \(\left(28.54+56.36\right):21:2\) 

\(=\left(1512+2016\right):21:2\) 

\(=3528:21:2\) 

\(=84\) 

9) \(\left(76.34-19.64\right):\left(38.9\right)\) 

\(=\left(2584-1216\right):342\) 

\(=1368:342\) 

\(=4\) 

10) \(\left(2+4+6+...+100\right).\left(36.333-108.111\right)\) 

\(=\left(2+4+6+...+100\right).\left(11988-11988\right)\) 

\(=\left(2+4+6+...+100\right).0\) 

\(=0\) 

11) \(\left(5.4^{11}-3.16^5\right):4^{10}\) 

\(=5.4^{11}:4^{10}-3.16^5:4^{10}\) 

\(=5.4-3.1\) 

\(=20-3\) 

\(=17\) 

12) \(7256.4375-725:3650+4375.7255\) 

\(=4375.\left(7256+7255\right)-\dfrac{29}{146}\) 

\(=4375.14511-\dfrac{29}{146}\) 

\(=63485624,8\) 

Câu 12 ko chắc!