18 * 23 +3 +45 * 6 +9 * 32 *2 =1263

425 *7*4 - 170 *60=1700 

132 *9 +132 =1320

( 56* 27 +56 +35 ):62=\(\frac{1603}{62}\) 

39 * ( 250 +87) +61 * ( 240 +97)=33700

Hk tốt!!! k cho mình nha!!@@

bạn có chép sai đề câu 1 không z

132 x 9 + 132 = 132x(9+1) = 132 x 10 = 1320

=200-100+400=500

Ta có :\(274.24+76.312+24.226+188.76=24.\left(274+226\right)+76.\left(312+188\right)\)

\(=24.500+76.500\)

\(=500.\left(24+76\right)\)

\(=500.100\)

\(=50000\)

Bài này trong sách giáo khoa dễ mà bạn

=(274+226)x24+(188+312)x76

= 500        x24+  500       x76

= 500x(24+76)

= 500x100

=50 000

 274. 24 + 76. 312 + 24. 226 + 188. 76

= 24. ( 274 + 226 ) + 76. ( 312 + 188 )

= 24. 500 + 76. 500

= 500. ( 24 + 76 )

= 500. 100

=50000

-Học tốt ! -

\(x-\left(-18\right)=134-\left(34-91\right)\)

⇔\(x+18=134-34+91\)

⇔\(x+18=191\)

⇔\(x=173\)

\(4x+\left(-188\right)=-358+\left(458-124\right)\)

⇔\(4x-188=-358+458-124\)

⇔\(4x-188=-24\)

⇔\(4x=164\)

⇔\(x=41\)

+) x-(-18) = 134 - (34-91)

<=> x +18 = 191

<=> x= 173

+) 4x+(-188) = -358 + (458 - 124)

<=> 4x =164

<=>x =41

41 nha

= 167 x 67 + 167 x 30 + 161 x 1 + 167 x 2 

= 167 x (67 +30 +1 + 2 )

=167 X 100

= 16 700

\(41\times36+59\times90+41\times84+59\times30=41\times\left(36+84\right)+59\times\left(90+30\right)=41\times120+59\times120=120\times\left(41+59\right)=120\times100=12000\)

\(4\times51\times7+2\times86\times7+12\times2\times7=4\times7\times\left(51+43+6\right)=28\times100=2800\)

\(87+35+13=100+35=135\)

\(62+34+66=62+100=162\)

\(212+109+188=400+109=509\)

\(305+195+110=500+110=610\)

\(15+46+85+54=100+100=200\)

\(277+144+86+123=400+230=630\)

a) \(255+312+188+645\)

\(=\left(255+645\right)+\left(312+188\right)\)

\(=900+500\)

\(=1400\)

b) \(25+12\cdot5-60\)

\(=25+60-60\)

\(=25\)

c) \(12\cdot75+12\cdot7+12\cdot18\)

\(=12\cdot\left(75+7+18\right)\)

\(=12\cdot100\)

\(=1200\)

d) \(2^4\cdot5-\left[131-\left(13-4\right)^2\right]\)

\(=16\cdot5-\left(131-9^2\right)\)

\(=80-\left(131-81\right)\)

\(=80-50\)

\(=30\)

sửa giùm mình đề câu a

a, 123+132+231+312+213+312

123+132+213+312+213+312

=(123+213)+(312+312)+(123+132)

= 123×2 + 312 ×2 + 255

= 426 + 624 +255

= 1050 + 255

= 1305

2) 159+195+519+591+915+951

=(159+951)+(519+591)+(195+915)

= 1110+1110+1110

= 1110×3

=3330

a) =1305 

 b)=3330 nha! cánh làm giống conan

a, 132 x 99 + 132 

= 132 x 99 + 132 x 1

= 132 x ( 99 + 1 )

= 132 x 100 = 13200

b, ( 56 x 27 + 56 x 35 ) : 62 

= 56 x ( 27 + 35 ) : 62

= 56 x 62 : 62

= 62 : 62 x 56

= 1 x 56 = 56

c, 2015 x ( 67 + 53 ) - 2005 x ( 53 + 67 )

= 2005 + 10 x 120 - 2005 x 120

= 2005 x 120 - 2005 x 120 + 10

= 2005 x ( 120 - 120 ) + 10

= 2005 x 0 + 10

= 0 + 10 = 10

d, 2009 x 2009 - 2010 x 2008 

= 2009 x 2009 - 2009 x 2009

= 2009 x ( 2009 - 2009 )

= 2009 x 0

= 0

e, 4357 x 267 x ( 630 - 315 x 2 )

= 4357 x 267 x ( 630 - 630 )

= 4357 x 267 x 0

= 4357 x 0

= 0

a. 132 x 99 + 132 

= 132 x (99 + 1) 

= 132 x 100

= 13200

b. (56 x 27 + 56 x 35) : 62

= 56 x (27 + 35) : 62

= 56 x 62 : 62

= 56

c. 2015 x (67 + 53) - 2005 x (53 + 67)

= (2015 - 2005) x (67 + 53)

= 2010 x 120

= 241200

a, 132 x 99 + 132 

= 132 x 99 + 132 x 1

= 132 x ( 99 + 1 )

= 132 x 100 = 13200

b, ( 56 x 27 + 56 x 35 ) : 62 

= 56 x ( 27 + 35 ) : 62

= 56 x 62 : 62

= 62 : 62 x 56

= 1 x 56 = 56

c, 2015 x ( 67 + 53 ) - 2005 x ( 53 + 67 )

= 2005 + 10 x 120 - 2005 x 120

= 2005 x 120 - 2005 x 120 + 10

= 2005 x ( 120 - 120 ) + 10

= 2005 x 0 + 10

= 0 + 10 = 10

d, 2009 x 2009 - 2010 x 2008 

= 2009 x 2009 - 2009 x 2009

= 2009 x ( 2009 - 2009 )

= 2009 x 0

= 0

e, 4357 x 267 x ( 630 - 315 x 2 )

= 4357 x 267 x ( 630 - 630 )

= 4357 x 267 x 0

= 4357 x 0

= 0